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WO2022259667A1 - Dispositif d'analyse par fluorescence x - Google Patents

Dispositif d'analyse par fluorescence x Download PDF

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Publication number
WO2022259667A1
WO2022259667A1 PCT/JP2022/011202 JP2022011202W WO2022259667A1 WO 2022259667 A1 WO2022259667 A1 WO 2022259667A1 JP 2022011202 W JP2022011202 W JP 2022011202W WO 2022259667 A1 WO2022259667 A1 WO 2022259667A1
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Prior art keywords
ratio
intensity
content
principal component
component
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Japanese (ja)
Inventor
渉 松田
恭之 山本
由行 片岡
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Rigaku Denki Co Ltd
Rigaku Corp
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Rigaku Denki Co Ltd
Rigaku Corp
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Priority to CN202280040950.XA priority Critical patent/CN117460950B/zh
Publication of WO2022259667A1 publication Critical patent/WO2022259667A1/fr
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N23/00—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00
    • G01N23/22—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by measuring secondary emission from the material
    • G01N23/2209—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by measuring secondary emission from the material using wavelength dispersive spectroscopy [WDS]
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N23/00—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00
    • G01N23/22—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by measuring secondary emission from the material
    • G01N23/223—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by measuring secondary emission from the material by irradiating the sample with X-rays or gamma-rays and by measuring X-ray fluorescence

Definitions

  • the present invention irradiates a sample with primary X-rays, and based on the measured intensity of the generated fluorescent X-rays, the fluorescent X-ray analysis determines the content of components in the sample by quantitative means using the fundamental parameter method or the calibration curve method. Regarding the device.
  • fluorescent X-ray analyzers that perform quantitative analysis are broadly divided into those that rely on the calibration curve method and those that rely on the fundamental parameter method (also known as the FP method).
  • a set of standard samples with known component content ratios are used to analyze unknown samples.
  • a calibration curve is obtained as a correlation with the measured intensity of the line).
  • a component is an element or a compound. Further, when the component is an element, the element itself is the measurement element corresponding to the component, and when the component is a compound, the element representing the compound becomes the measurement element corresponding to the component (for example, See paragraph 0002 of Patent Document 1).
  • the correlation between the height of the analytical surface of the sample and the measured intensity is used as the measured intensity for more accurate analysis. Based on this, a so-called height correction is performed using the measured intensity corrected so as to eliminate the influence of the height variation of the analysis surface of the sample on the measured intensity (see, for example, claims 2 and 12 of Patent Document 3). .
  • Non-Patent Document 1 does not describe matrix correction for removing the effects of absorption and excitation of fluorescent X-rays due to the elements contained in the sample, a more accurate analysis of the ratio of the content of the main components is required. Even in consideration of common general technical knowledge, it is unclear how the calibration curve, which is the correlation between the measured intensity ratio and the content ratio, should be subjected to matrix correction when requested.
  • the correlation between the ratio of the measured strength and the ratio of the theoretical strength for multiple principal components it is conceivable to create and use a sensitivity curve.
  • iterative calculations are performed to update the content based on the theoretical strength calculated from the assumed content and the measured strength converted to the theoretical strength scale by the device sensitivity curve, and the converged content Since the ratio is the analysis result, even if the device sensitivity curve, which is the correlation between the ratio of the measured intensity and the ratio of the theoretical intensity, is used, it is unclear how to repeat the calculation even in consideration of common technical knowledge. be.
  • the present invention has been made in view of the above-described conventional problems, and provides an X-ray fluorescence spectrometer for determining the content of components in a sample by means of quantification using the fundamental parameter method or the calibration curve method.
  • the object is to provide a device that can analyze the ratio with sufficient precision.
  • the first configuration of the present invention first irradiates a sample with primary X-rays, and based on the measured intensity of the generated fluorescent X-rays, the amount of is a fluorescent X-ray analyzer for determining the content of the component of
  • the quantification means is a standard in which a single reference principal component as a reference principal component and a comparison principal component to be compared with the reference principal component are designated as components, and the content of each component is known.
  • a standard sample measurement step of measuring the intensity of a measurement line that is a fluorescent X-ray corresponding to a component of a sample a standard sample theoretical intensity calculation step of calculating a theoretical intensity based on a known content rate for each measurement line, Based on the measured intensity in the standard sample measurement step and the theoretical intensity in the standard sample theoretical intensity calculation step, the measured intensity of the comparison principal component with respect to the measured intensity of the reference principal component is calculated for each measurement line corresponding to the comparison principal component.
  • the quantification means performs an unknown sample measurement step of measuring the intensity of the measurement line for an unknown sample in which the reference principal component and the comparison principal component are designated as components and the content ratio of each component is unknown; For each measurement line corresponding to the principal component, based on the measured intensity in the unknown sample measurement step and the intensity ratio instrument sensitivity curve in the intensity ratio instrument sensitivity curve creation step, the contrast principal component with respect to the measured intensity of the reference principal component Execute an intensity ratio conversion step of converting the measured intensity ratio, which is the ratio of measured intensities, into a theoretical intensity scale to obtain a converted measured intensity ratio, and a content rate initial value setting step of setting the initial value of the content rate of each component. do.
  • the quantification means includes an unknown sample theoretical intensity calculation step of calculating the theoretical intensity based on the latest content rate for each measurement line, and a converted measured intensity ratio in the intensity ratio conversion step for each comparison principal component and a theoretical strength ratio based on the theoretical strength in the unknown sample theoretical strength calculation step, a content rate update step for updating the content rate ratio, which is the ratio of the content rate of the contrasting principal component to the content rate of the reference principal component , a content rate update step of updating the content rate of each component based on the latest content rate ratio, a convergence determination step of performing convergence determination based on a predetermined convergence condition, and a content of the component in the unknown sample to be obtained and a result output step of outputting the latest content rate as a rate, and in the convergence determination step, if the determination is unconverged, the procedure is returned to the unknown sample theoretical strength calculation step, and if the determination is convergence. , the procedure advances to the result output step.
  • the quantification means using the fundamental parameter method includes the measured intensity ratio, which is the ratio of the measured intensity of the contrast principal component to the measured intensity of the reference principal component, and the theoretical intensity of the reference principal component.
  • An intensity ratio instrument sensitivity curve creation step for creating an intensity ratio instrument sensitivity curve that is a correlation with the theoretical intensity ratio that is the ratio of the theoretical intensities of the contrasting principal components, and the measured intensity ratio on the theoretical intensity scale based on the intensity ratio instrument sensitivity curve
  • a content update step is performed to update the content of each component based on the latest content ratio.
  • a sample is irradiated with primary X-rays, and the content of the component in the sample is determined by quantitative means using the fundamental parameter method based on the measured intensity of the generated fluorescent X-rays. It is an X-ray analyzer.
  • the quantification means designates a single reference principal component as a reference principal component, a comparison principal component to be compared with the reference principal component, and subcomponents as components, and the content of each component is For a known standard sample, a standard sample measurement step of measuring the intensity of a measurement line that is a fluorescent X-ray corresponding to a component, and a standard sample theoretical intensity of calculating a theoretical intensity based on a known content rate for each measurement line In a calculation step, for each measurement line corresponding to a subcomponent, the measured intensities of the subcomponents and the theoretical intensities of the subcomponents are calculated based on the measured intensities in the standard sample measurement step and the theoretical intensities in the standard sample theoretical intensity calculation step.
  • a device sensitivity curve creating step of creating a device sensitivity curve that is a correlation with intensity Correlation between the measured intensity ratio, which is the ratio of the measured intensity of the contrasting principal component to the measured intensity of the reference principal component, and the theoretical intensity ratio, which is the ratio of the theoretical intensity of the contrasting principal component to the theoretical intensity of the reference principal component, based on the intensity and an intensity ratio instrument sensitivity curve creation step for creating an intensity ratio instrument sensitivity curve.
  • the quantification means performs unknown sample measurement for measuring the intensity of the measurement line for an unknown sample in which the reference principal component, the comparison principal component, and the subcomponent are specified as components and the content ratio of each component is unknown.
  • the measured intensity of the secondary component is converted to a theoretical intensity scale based on the measured intensity in the unknown sample measurement step and the device sensitivity curve in the device sensitivity curve creation step.
  • an intensity conversion step that converts the measured intensity into a converted measurement intensity, and for each measurement line corresponding to the contrasting principal component, based on the measured intensity in the unknown sample measurement step and the intensity ratio instrument sensitivity curve in the intensity ratio instrument sensitivity curve creation step , an intensity ratio conversion step of converting the measured intensity ratio, which is the ratio of the measured intensity of the contrasting principal component to the measured intensity of the reference principal component, into a theoretical intensity scale and making it a converted measured intensity ratio, and the initial value of the content rate of each component and a content rate initial value setting step for setting the
  • the quantification means includes an unknown sample theoretical strength calculation step of calculating the theoretical strength based on the latest content rate for each measurement line, a converted measured strength in the strength conversion step for each subcomponent, and the a subcomponent content rate updating step of updating the content rate based on the theoretical strength in the unknown sample theoretical strength calculation step; a converted measured strength ratio in the strength ratio conversion step; A content ratio update step for updating the content ratio, which is the ratio of the content ratio of the contrasting main component to the content ratio of the reference main component, based on the theoretical strength ratio by the theoretical strength in the theoretical strength calculation step, and the latest content A principal component content rate update step for updating the content rate of the comparison principal component and the content rate of the reference principal component based on the rate ratio and the latest content rate of the subcomponent, and convergence for performing convergence judgment based on a predetermined convergence condition a determination step and a result output step of outputting the latest content rate as the content rate of the component in the unknown sample to be obtained;
  • the process returns to the theoretical strength calculation step, and advances the procedure to
  • the quantification means using the fundamental parameter method includes the measured intensity ratio, which is the ratio of the measured intensity of the contrast principal component to the measured intensity of the reference principal component, and the theoretical intensity of the reference principal component.
  • An intensity ratio instrument sensitivity curve creation step for creating an intensity ratio instrument sensitivity curve that is a correlation with the theoretical intensity ratio that is the ratio of the theoretical intensities of the contrasting principal components, and the measured intensity ratio on the theoretical intensity scale based on the intensity ratio instrument sensitivity curve
  • a principal component content rate update step is executed to update the content rate of the contrasting principal component and the content rate of the reference principal component based on the latest content rate ratio.
  • the sample is irradiated with primary X-rays, and the content of the component in the sample is determined by a quantitative means using the fundamental parameter method based on the measured intensity of the generated fluorescent X-rays. It is an X-ray analyzer.
  • the quantification means designates a single reference principal component as a reference principal component, a comparison principal component to be compared with the reference principal component, and subcomponents as components, and the content of each component is
  • a standard sample measurement step of measuring the intensity of a measurement line that is a fluorescent X-ray corresponding to a component, and a standard sample theoretical intensity of calculating a theoretical intensity based on a known content rate for each measurement line A calculation step and, for each measurement line, based on the measured intensity in the standard sample measurement step and the theoretical intensity in the standard sample theoretical intensity calculation step, create an apparatus sensitivity curve that is a correlation between the measured intensity and the theoretical intensity.
  • the measured intensity of the reference principal component is calculated based on the measured intensity in the standard sample measurement step and the theoretical intensity in the standard sample theoretical intensity calculation step.
  • Intensity ratio which is the correlation between the measured intensity ratio, which is the ratio of the measured intensity of the contrasting principal component, and the theoretical intensity ratio, which is the ratio of the theoretical intensity of the contrasting principal component to the theoretical intensity of the reference principal component.
  • the quantification means performs unknown sample measurement for measuring the intensity of the measurement line for an unknown sample in which the reference principal component, the comparison principal component, and the subcomponent are specified as components and the content ratio of each component is unknown. and for each measurement line, based on the measured intensity in the unknown sample measurement step and the device sensitivity curve in the device sensitivity curve creation step, the measured intensity is converted to a theoretical intensity scale and converted into a converted measured intensity.
  • the quantification means includes an unknown sample theoretical strength calculation step of calculating the theoretical strength based on the latest content rate for each measurement line, a converted measured strength in the strength conversion step for each subcomponent, and the a subcomponent content rate updating step for updating the content rate based on the theoretical strength in the unknown sample theoretical strength calculation step;
  • An estimated content rate calculation step of calculating an estimated content rate based on the theoretical strength in the sample theoretical strength calculation step, a converted measured strength ratio in the strength ratio conversion step, and the unknown sample theory for each comparison principal component a content ratio update step of updating a content ratio, which is the ratio of the content of the contrasting principal component to the content of the reference principal component, based on the theoretical strength ratio by the theoretical strength in the strength calculation step;
  • the procedure executes a component content rate update step, a convergence determination step of performing convergence determination based on a predetermined convergence condition, and a result output step of outputting the latest content rate as the content rate of the component in the unknown sample to be obtained,
  • the convergence judging step if the determination is non-converged, the procedure returns to the unknown sample theoretical intensity calculation step, and if the convergence is judged, the procedure advances to the result output step.
  • the quantification means using the fundamental parameter method includes the measured intensity ratio, which is the ratio of the measured intensity of the contrast principal component to the measured intensity of the reference principal component, and the theoretical intensity of the reference principal component.
  • An intensity ratio instrument sensitivity curve creation step for creating an intensity ratio instrument sensitivity curve that is a correlation with the theoretical intensity ratio that is the ratio of the theoretical intensities of the contrasting principal components, and the measured intensity ratio on the theoretical intensity scale based on the intensity ratio instrument sensitivity curve an intensity ratio conversion step of converting to a converted measured intensity ratio; an estimated content ratio calculation step of calculating estimated content ratios for the comparison principal component and the reference principal component;
  • a content ratio update step that updates the content ratio, which is the ratio of the content rates of the components, the contrast principal component based on the sum of the estimated content rate of the contrast principal component and the estimated content rate of the reference principal component and the latest content ratio and the content of the reference principal component are updated.
  • the quantification means skips the subcomponent content rate update step when subcomponents are not designated as components for standard samples and unknown samples.
  • a sample is irradiated with primary X-rays, and the content of components in the sample is determined by a quantitative means using a calibration curve method based on the measured intensity of the generated fluorescent X-rays. It is an X-ray analyzer.
  • the quantification means designates a single reference principal component as a reference principal component and a comparison principal component to be compared with the reference principal component as components, and the content of each component is known.
  • a standard sample measurement step of measuring the intensity of a measurement line, which is a fluorescent X-ray corresponding to a component, for a standard sample in which an additional correction component used for matrix correction is specified from all components; For each, based on the known content rate and the measured intensity in the standard sample measurement step, the measured intensity ratio, which is the ratio of the measured intensity of the contrast principal component to the measured intensity of the reference principal component, and the content rate of the reference principal component and an intensity ratio calibration curve creating step of creating an intensity ratio calibration curve that is a correlation with the content ratio, which is the ratio of the content ratios of the contrasting principal components, and that includes a matrix correction term.
  • the quantification means measures the intensity of the measurement line for an unknown sample in which the reference principal component and the comparison principal component are specified as components, the content rate of each component is unknown, and the additional correction component is specified. Uncorrected content rate before matrix correction based on the measured intensity in the unknown sample measurement step and the intensity ratio calibration curve in the intensity ratio calibration curve creation step for each comparison principal component.
  • An uncorrected content ratio calculation step for calculating the ratio, and for each component, the uncorrected content ratio before matrix correction is calculated based on the uncorrected content ratio in the uncorrected content ratio calculation step, and the content ratio
  • a content rate initial value setting step for setting as an initial value of is executed.
  • the quantification means performs matrix correction on the uncorrected content ratio in the uncorrected content ratio calculation step for each comparison principal component based on the content ratio of the latest addition correction component, and the content ratio is a content ratio update step of updating the ratio; a content ratio update step of updating the content ratio of each component based on the content ratio updated in the content ratio update step; and convergence determination based on a predetermined convergence condition. and a result output step of outputting the latest content rate as the content rate of the component in the unknown sample to be obtained.
  • the process returns to the content rate ratio update step, and if it is a determination of convergence, the procedure advances to the result output step.
  • the quantification means using the calibration curve method includes a measured intensity ratio, which is the ratio of the measured intensity of the contrast principal component to the measured intensity of the reference principal component, and the content ratio of the reference principal component.
  • An intensity ratio calibration curve creation step for creating an intensity ratio calibration curve including a matrix correction term, which is a correlation with the content ratio, which is the ratio of the content ratio of the contrasting principal components,
  • An uncorrected content ratio calculation step for calculating the corrected content ratio
  • a content ratio update step for updating the content ratio by performing matrix correction on the uncorrected content ratio based on the content ratio of the latest additional correction component. , performs a content rate update step of updating the content rate of each component based on the updated content rate ratio.
  • a sample is irradiated with primary X-rays, and the content of components in the sample is determined by a quantitative means using a calibration curve method based on the measured intensity of the generated fluorescent X-rays. It is an X-ray analyzer.
  • the quantification means designates a single reference principal component as a reference principal component, a comparison principal component to be compared with the reference principal component, and subcomponents as components, and the content of each component is A standard sample measurement step of measuring the intensity of a measurement line, which is a fluorescent X-ray corresponding to a component, for a standard sample in which an additive correction component to be used for matrix correction is specified from all components, and a standard sample measurement step corresponding to the subcomponent.
  • a calibration curve that is a correlation between the measured intensity of the subcomponent and the content of the subcomponent and includes a matrix correction term
  • the measured intensity of the comparison principal component with respect to the measured intensity of the reference principal component based on the known content rate and the measured intensity in the standard sample measurement step
  • Intensity ratio calibration that creates an intensity ratio calibration curve that includes a matrix correction term that is a correlation between the measured intensity ratio, which is the ratio of , and the content ratio, which is the ratio of the content of the contrasting principal component to the content of the reference principal component a line creation step;
  • the quantification means performs the above An unknown sample measurement step of measuring the intensity of the measurement line, and for each subcomponent, the uncorrected content rate before matrix correction is calculated based on the measured intensity in the unknown sample measurement step and the calibration curve in the calibration curve creation step.
  • a secondary component content rate initial value setting step of calculating and setting the initial value of the content rate, and the measured intensity in the unknown sample measurement step and the intensity ratio calibration curve in the intensity ratio calibration curve creation step for each comparison principal component An uncorrected content ratio calculation step for calculating an uncorrected content ratio before matrix correction, and an uncorrected content ratio in the uncorrected content ratio calculation step for the comparison principal component and the reference principal component based on , the uncorrected content rate of the subcomponents in the subcomponent content rate initial value setting step, the uncorrected content rate before matrix correction is calculated, and the initial value of the main component content rate is set as the initial value of the content rate Perform configuration steps.
  • the quantifying means performs matrix correction on the uncorrected content rate in the subcomponent content rate initial value setting step for each subcomponent based on the content rate of the latest additional correction component, and calculates the content rate.
  • the quantification means using the calibration curve method includes a measured intensity ratio, which is the ratio of the measured intensity of the contrast principal component to the measured intensity of the reference principal component, and the content ratio of the reference principal component.
  • An intensity ratio calibration curve creation step for creating an intensity ratio calibration curve including a matrix correction term, which is a correlation with the content ratio, which is the ratio of the content ratio of the contrasting principal components,
  • An uncorrected content ratio calculation step for calculating the corrected content ratio
  • a content ratio update step for updating the content ratio by performing matrix correction on the uncorrected content ratio based on the content ratio of the latest additional correction component.
  • a sample is irradiated with primary X-rays, and the content of components in the sample is determined by a quantitative means using a calibration curve method based on the measured intensity of the generated fluorescent X-rays. It is an X-ray analyzer.
  • the quantification means designates a single reference principal component as a reference principal component, a comparison principal component to be compared with the reference principal component, and subcomponents as components, and the content of each component is
  • a standard sample measurement step of measuring the intensity of a measurement line which is a fluorescent X-ray corresponding to a component, for a standard sample that is known and for which an additional correction component used for matrix correction is specified from all components; , based on the known content rate and the measured intensity in the standard sample measurement step, a calibration curve creation step of creating a calibration curve that is a correlation between the measured intensity and the content rate and includes a matrix correction term;
  • the measured intensity ratio which is the ratio of the measured intensity of the contrast principal component to the measured intensity of the reference principal component, based on the known content and the measured intensity in the standard sample measurement step, and the reference principal component and an intensity ratio calibration curve creation step of creating an intensity ratio calibration curve including a matrix correction term, which is a correlation with the content ratio, which is the ratio of
  • the quantification means performs the above An unknown sample measurement step of measuring the intensity of the measurement line, and for each component, the uncorrected content rate before matrix correction is calculated based on the measured intensity in the unknown sample measurement step and the calibration curve in the calibration curve creation step. and a content rate initial value setting step for setting the initial value of the content rate, and for each comparison principal component, based on the measured intensity in the unknown sample measurement step and the intensity ratio calibration curve in the intensity ratio calibration curve creation step , and an uncorrected content ratio calculation step of calculating an uncorrected content ratio before matrix correction.
  • the quantification means performs matrix correction on the uncorrected content rate in the content rate initial value setting step based on the content rate of the latest additional correction component for each subcomponent, and updates the content rate.
  • Sub-component content rate update step and regarding the comparison principal component and the reference principal component, the content of the latest addition correction component used in the sub-component content rate update step with respect to the uncorrected content rate in the content rate initial value setting step an estimated content rate calculation step of performing matrix correction based on the ratio and calculating an estimated content rate;
  • a content rate ratio update step for updating the content rate ratio by performing matrix correction based on the content rate of the latest addition correction component used in the rate update step, and an estimated content rate of the comparison principal component in the estimated content rate calculation step and updating the content rate of the comparison principal component and the content rate of the reference principal component based on the sum of the estimated content rates of the reference principal components and the content rate updated in the content rate updating step a convergence determination step of performing convergence determination based on a predetermined convergence condition; and a result output step
  • the quantification means using the calibration curve method is the measured intensity ratio, which is the ratio of the measured intensity of the contrast principal component to the measured intensity of the reference principal component, and the content ratio of the reference principal component.
  • An intensity ratio calibration curve creation step for creating an intensity ratio calibration curve including a matrix correction term, which is a correlation with the content ratio, which is the ratio of the content ratio of the contrasting principal components.
  • the uncorrected content ratio calculation step for calculating the corrected content ratio
  • the uncorrected content ratios of the comparison principal component and the reference principal component are subjected to matrix correction based on the content ratio of the latest addition correction component, and the estimated content ratio is calculated as Estimated content rate calculation step for calculation, matrix correction for uncorrected content rate ratio based on the content rate of the latest addition correction component, content rate update step for updating the content rate ratio, estimated content of comparison principal component perform a principal component content update step of updating the content of the contrasting principal component and the reference principal component based on the sum of the ratio and the
  • the quantification means skips the subcomponent content update step when subcomponents are not designated as components for standard samples and unknown samples.
  • the quantification means determines the correlation between the height of the analysis surface of the sample and the measured intensity as the measured intensity in the standard sample measuring step and the measured intensity in the unknown sample measuring step. Based on this, the measured intensity corrected to remove the effect of the height variation of the sample analysis surface on the measured intensity may be used. Depending on the morphology of the sample, such a height correction provides a more accurate analysis of the content ratios of the main components.
  • FIG. 10 is a flow chart showing the operation of the quantification means included in the fluorescent X-ray spectrometer according to the fifth embodiment of the present invention
  • FIG. 10 is a flow chart showing the operation of a quantification means included in the fluorescent X-ray spectrometer according to the sixth embodiment of the present invention
  • FIG. 1 is a schematic diagram showing a fluorescent X-ray analyzer according to first to sixth embodiments of the present invention
  • a fluorescent X-ray spectrometer according to the first embodiment of the present invention will be described below.
  • the X-ray fluorescence spectrometer of the first embodiment irradiates samples 1 and 14 (including both the unknown sample 1 and the standard sample 14) with primary X-rays 3 to generate secondary X-rays.
  • a scanning fluorescent X-ray analyzer for measuring the intensity of X-rays 5, comprising a sample table 2 on which samples 1 and 14 are placed, and an X-ray tube for irradiating the samples 1 and 14 with primary X-rays 3.
  • X-ray source 4 such as, spectroscopic element 6 for dispersing secondary X-rays 5 such as fluorescent X-rays generated from samples 1 and 14, and secondary X-rays 7 separated by spectroscopic element 6 are incident, and a detector 8 for detecting the intensity thereof.
  • the output of the detector 8 passes through an amplifier (not shown), a pulse height analyzer, a counting means, etc., and is input to a control means 11 such as a computer for controlling the entire apparatus.
  • the X-ray fluorescence spectrometer of the first embodiment is a wavelength dispersive and scanning X-ray fluorescence spectrometer. It has an interlocking means 10 for interlocking the detector 8, that is, a so-called goniometer.
  • the interlocking means 10 changes the spectral angle 2 ⁇ to change the wavelength of the secondary X-rays 7 to be dispersed, and the secondary X-rays 7 thus dispersed are directed to the detector 8.
  • the spectroscopic element 6 is rotated about an axis O through the center of its surface and perpendicular to the plane of the paper, so as to be incident, and the detector 8 is rotated twice its rotation angle along a circle 12 about the axis O. to rotate.
  • the value of the spectral angle 2 ⁇ (2 ⁇ angle) is input from the interlocking means 10 to the control means 11 .
  • the X-ray fluorescence spectrometer of the first embodiment includes a quantification means 13 as a program installed in the control means 11. Based on the measured intensity of the X-ray fluorescence 5, the quantification means 13 using the fundamental parameter method The contents of the components in Samples 1 and 14 are determined.
  • the X-ray fluorescence spectrometer may be a wavelength dispersive and multi-element simultaneous analysis X-ray fluorescence spectrometer, or may be an X-ray fluorescence spectrometer of an energy dispersive type.
  • the quantification means 13 determines a single reference principal component b as a reference principal component and a single or a plurality of contrasting principal components i1 to be contrasted with the reference principal component b. i (including b and i1), and the content ratio W i (including W b and W i1 ) of each component i is known. Measure the intensity of a measurement line.
  • the measured intensity IiM for the component i includes the measured intensity IbM for the reference principal component b and the measured intensity Ii1M for the contrast principal component i1.
  • the theoretical strength I iT (including I bT and I i1T ) is calculated for each measurement line based on the known content rate W i by a known theoretical strength formula.
  • the intensity ratio instrument sensitivity coefficients A i1R , B i1R , and C i1R of the following equation (1) representing the intensity ratio instrument sensitivity
  • I i1bRT A i1R I i1bRM 2 +B i1R I i1bRM +C i1R (1)
  • the reference principal component b and the contrasting principal component i1 are designated as the component i, and the content ratio W i of each component i is unknown for the unknown sample 1, the intensity I Measure iM .
  • the measured intensities I i1M and I bM in the unknown sample measurement step and the intensity ratio instrument sensitivity in the intensity ratio instrument sensitivity curve creation step are calculated for each measurement line corresponding to the contrast principal component i1.
  • the measured intensity ratio Ii1bRM which is the ratio of the measured intensity Ii1M of the contrast principal component i1 to the measured intensity IbM of the reference principal component b, is expressed by the following equation (2). Convert to the theoretical intensity scale to obtain the converted measured intensity ratio Ii1bRTM .
  • I i1bRTM A i1R I i1bRM 2 +B i1R I i1bRM +C i1R (2)
  • initial values W i1 (0) and W b (0) of the content rates of the respective components i1 and b are set. Specifically, first, for each comparative principal component i1, the initial value R i1b (0) of the content ratio R i1b that is the ratio of the content ratio W i1 of the comparative principal component i1 to the content W b of the reference principal component b is set as shown in the following equation (3).
  • the initial values W i1 (0) and W b (0) of the content of the respective components i1 and b are calculated by the following equations (4) and (5). , and set it.
  • the ratio W i1 (0)/W b (0) of the initial value of the content rate may be set as the initial value R i1b (0) of the content rate in the content rate initial value setting step.
  • the initial value of the content ratio R i1b (0) is not set, and in the first content ratio updating step described later, the initial value of the content ratio W i1 (0)
  • the initial value R i1b (0) of the content ratio may be set by setting /W b (0) as the content ratio R i1b (n ⁇ 1) before updating.
  • the theoretical strength I iT (n-1) is calculated for each measurement line based on the latest content W i (n-1) by a known theoretical strength formula.
  • the content ratio W i (n) and the numerical value n in parentheses of the content ratio R i1b (n) described below are the number of iterative calculations for updating the content ratio W i and the content ratio R i1b .
  • the definition of the numerical value n is the same for devices of other embodiments.
  • R i1b (n) is updated to R i1b (n) as in the following equation (6).
  • the initial value ratio of the content rates W i1 (0)/W b (0) is In the second iterative calculation, the content rate ratio W i1 (n-1)/W b (n-1) updated in the previous iterative calculation is used.
  • R i1b (n) R i1b (n ⁇ 1) ⁇ (I i1bRTM /I i1bRT (n ⁇ 1)) (6)
  • the content ratios W i1 (n-1) and W b (n-1) of the components i1 and b are updated based on the latest content ratio R i1b (n) by the following equation ( 7) Update to W i1 (n) and W b (n) obtained in (8).
  • W b (n) 100/(1+ ⁇ R i1b (n)) (7)
  • W i1 (n) R i1b (n) ⁇ W b (n) (8)
  • the convergence determination step convergence determination is performed based on a predetermined convergence condition.
  • the predetermined convergence condition based on a known technique, for example, the absolute A condition that the value is less than a predetermined value and a condition that the number of times n of repeated calculations reaches a predetermined number are conceivable. Then, if the predetermined convergence condition is not satisfied, it is determined as unconverged (No), the procedure is returned to the unknown sample theoretical strength calculation step, and the content rate W i (n) updated in the content rate update step is updated to the latest The procedure up to the convergence determination step is repeated with the content rate W i (n-1). On the other hand, if the predetermined convergence condition is satisfied, it is judged as convergence (Yes), the iterative calculation is terminated, and the procedure proceeds to the result output step.
  • the latest content W i (n) is output as the content W i of the component i in the unknown sample 1 to be obtained.
  • the quantification means 13 using the fundamental parameter method calculates the ratio of the measured intensity Ii1M of the contrast principal component i1 to the measured intensity IbM of the reference principal component b.
  • the intensity ratio that is the correlation between a certain measured intensity ratio Ii1bRM and the theoretical intensity ratio Ii1bRT , which is the ratio of the theoretical intensity Ii1T of the contrasting principal component i1 to the theoretical intensity IbT of the reference principal component b, to create an intensity ratio instrument sensitivity curve.
  • a ratio instrument sensitivity curve creation step an intensity ratio conversion step of converting the measured intensity ratio I i1bRM to a theoretical intensity scale based on the intensity ratio instrument sensitivity curve to obtain a converted measured intensity ratio I i1bRTM , based on the converted measured intensity ratio I i1bRTM
  • the content ratio R i1b (n-1) which is the ratio of the content W i1 (n-1) of the contrasting main component i1 to the content W b (n-1) of the reference main component b, is set to R i1b (n).
  • Content rate update step to update, the content rate W i1 (n-1), W b (n-1) of each component i1 , b based on the latest content rate R i1b (n) to Wi1 (n) , W b (n).
  • the intensity ratio which is the correlation between the measured intensity ratio and the theoretical intensity ratio as shown in equation (1)
  • the instrument sensitivity A curve is utilized, but not a traditional instrument sensitivity curve which is a correlation between measured intensity and theoretical intensity.
  • Such a quantification method is called a first component quantification method.
  • the X-ray fluorescence spectrometer of the second embodiment uses the fundamental parameter method for quantifying the first component in the same way as the X-ray fluorescence spectrometer of the first embodiment. It contains not only ingredients but also sub-ingredients. A minor component is, for example, a component with a low content and for which an intensity ratio instrument sensitivity curve is not generated for the corresponding measurement line.
  • the configuration of the X-ray fluorescence spectrometer of the second embodiment differs from that of the X-ray fluorescence spectrometer of the first embodiment only in the operation of the quantification means 13 provided. do.
  • the quantification means 13 includes a single reference principal component b as a reference principal component, a single or a plurality of contrasting principal components i1 to be contrasted with the reference principal component b, and a single One or more subcomponents i2 are designated as components i (including b, i1, i2) and the content W i of each component i (including W b , W i1 , W i2 ) is known
  • the intensity of the measurement line which is the fluorescent X-ray 5 corresponding to the component i, is measured.
  • the measured intensity I iM for component i includes the measured intensity I bM for the reference principal component b, the measured intensity I i1M for the contrast principal component i1, and the measured intensity I i2M for the minor component i2.
  • the theoretical strength I iT (including I bT , I i1T , and I i2T ) is calculated by a known theoretical strength formula based on the known content rate W i for each measurement line. do.
  • a device sensitivity curve is constructed which is the correlation between the measured intensity I i2M of subcomponent i2 and the theoretical intensity I i2T of subcomponent i2.
  • the device sensitivity coefficients A i2 , B i2 , and C i2 of the following equation (9) representing the device sensitivity curve are obtained.
  • Ii2T Ai2Ii2M2 + Bi2Ii2M + Ci2 ( 9)
  • Create an intensity ratio instrument sensitivity curve that is a correlation of Specifically, the intensity ratio instrument sensitivity coefficients A i1R , B i1R , and C i1R of the following equation (1) representing the intensity ratio instrument sensitivity curve are obtained.
  • I i1bRT A i1R I i1bRM 2 +B i1R I i1bRM +C i1R (1)
  • the Measure the intensity I iM of the measurement line for the unknown sample 1 in which the reference principal component b, the contrasting principal component i1 and the subcomponent i2 are designated as the component i, and the content ratio W i of each component i is unknown, the Measure the intensity I iM of the measurement line.
  • the intensity conversion step for each measurement line corresponding to the subcomponent i2, based on the measured intensity I i2M in the unknown sample measurement step and the device sensitivity curve (equation (9)) in the device sensitivity curve creation step Then, the measured intensity Ii2M of the subcomponent i2 is converted to a theoretical intensity scale as shown in the following equation (10) to obtain a converted measured intensity Ii2TM .
  • Ii2TM Ai2Ii2M2 + Bi2Ii2M + Ci2 ( 10)
  • the intensity ratio instrument sensitivity curve creation step for each measurement line corresponding to the contrast principal component i1, the measured intensities I i1M , I bM and Based on the intensity ratio instrument sensitivity curve (equation (1)) in the intensity ratio instrument sensitivity curve creation step, the measured intensity, which is the ratio of the measured intensity I i1M of the contrast principal component i1 to the measured intensity I bM of the reference principal component b
  • the ratio Ii1bRM is converted to a theoretical intensity scale as shown in the following equation (2) to obtain a converted measured intensity ratio Ii1bRTM .
  • I i1bRTM A i1R I i1bRM 2 +B i1R I i1bRM +C i1R (2)
  • initial values W i1 (0), W b (0), and W i2 (0) of the content rates of the respective components i1, b, and i2 are set. Specifically, first, for each comparative principal component i1, the initial value R i1b (0) of the content ratio R i1b that is the ratio of the content ratio W i1 of the comparative principal component i1 to the content W b of the reference principal component b is set as shown in the following equation (3).
  • the initial value W i1 (0) of the content of the comparative main component i1 is determined and set by the following equations (12) and (5).
  • W b (0) (100 ⁇ W i2 (0))/(1+ ⁇ R i1b (0)) (12)
  • Wi1 (0) Ri1b (0) ⁇ Wb(0) ( 5)
  • the average content of each known component in a plurality of standard samples is obtained, and the initial value W i1 (0), W b (0), and W i2 (0) may be set, or the initial value W i1 ( 0), W b (0), and W i2 (0).
  • the setting of the initial value R i1b (0) of the content ratio in that case is also the same as described for the fluorescent X-ray spectrometer of the first embodiment.
  • the calculation is repeated, and in the step of calculating the theoretical intensity of the unknown sample, as in the X-ray fluorescence spectrometer of the first embodiment, the latest content W i (n-1) is known for each measurement line.
  • the theoretical intensity I iT (n-1) is calculated by the theoretical intensity formula of .
  • the content rate W i2 (n ⁇ 1) is updated to W i2 (n) as in the following equation (13).
  • W i2 (n) W i2 (n ⁇ 1) ⁇ (I i2TM /I i2T (n ⁇ 1)) (13)
  • the content ratio is the ratio of the content rate W i1 (n-1) of the contrasting main component i1 to the content rate W b (n-1) of the reference main component b
  • R i1b (n) R i1b (n ⁇ 1) ⁇ (I i1bRTM /I i1bRT (n ⁇ 1)) (6)
  • the content rate W i1 (n ⁇ 1) of the comparative principal component i1 and the content rate W b (n ⁇ 1) of the reference principal component b are changed to the latest content rate R i1b ( n) and the latest content W i2 (n) of the subcomponent i2 to W i1 (n) and W b (n) obtained by the following equations (14) and (8).
  • the convergence determination step convergence determination is performed based on a predetermined convergence condition. Then, the procedure returns to the unknown sample theoretical intensity calculation step, and if the predetermined convergence condition is satisfied, it is judged to be converged (Yes), and the procedure advances to the result output step.
  • the latest content W i (n) is output as the content W i of the component i in the unknown sample 1 to be obtained.
  • the quantification means 13 using the fundamental parameter method calculates the ratio of the measured intensity Ii1M of the contrast principal component i1 to the measured intensity IbM of the reference principal component b.
  • the intensity ratio that is the correlation between a certain measured intensity ratio Ii1bRM and the theoretical intensity ratio Ii1bRT , which is the ratio of the theoretical intensity Ii1T of the contrasting principal component i1 to the theoretical intensity IbT of the reference principal component b, to create an intensity ratio instrument sensitivity curve.
  • a ratio instrument sensitivity curve creation step an intensity ratio conversion step of converting the measured intensity ratio I i1bRM to a theoretical intensity scale based on the intensity ratio instrument sensitivity curve to obtain a converted measured intensity ratio I i1bRTM , based on the converted measured intensity ratio I i1bRTM
  • the content ratio R i1b (n-1) which is the ratio of the content W i1 (n-1) of the contrasting main component i1 to the content W b (n-1) of the reference main component b, is set to R i1b (n).
  • the fluorescent X-ray spectrometer of the third embodiment uses the second component quantification method of the fundamental parameter method, which will be described later.
  • the target standard sample and unknown sample contain not only main components but also subcomponents.
  • the X-ray fluorescence spectrometer of the third embodiment differs from the X-ray fluorescence spectrometers of the first and second embodiments only in the operation of the quantification means 13 provided. will be explained according to
  • the quantification means 13 first compares a single reference principal component b, which is a reference principal component, with the reference principal component b in the standard sample measurement step, similarly to the fluorescent X-ray spectrometer of the second embodiment.
  • the single or multiple contrasting principal components i1 and the single or multiple minor components i2 are designated as components i (including b, i1, i2), and the content W i (W b , W i1 and W i2 ) are known, the intensity of the measurement line, which is the fluorescent X-ray 5 corresponding to the component i, is measured.
  • the measured intensity I iM for component i includes the measured intensity I bM for the reference principal component b, the measured intensity I i1M for the contrast principal component i1, and the measured intensity I i2M for the minor component i2.
  • the apparatus sensitivity curve creation step for each measurement line, the measured intensity I iM and the theoretical A device sensitivity curve is generated that is a function of intensity IiT . Specifically, the device sensitivity coefficients A i , B i , and C i of the following equation (15) representing the device sensitivity curve are obtained.
  • IiT AiIiM2 + BiIiM + Ci (15 )
  • the intensity ratio instrument sensitivity coefficients A i1R , B i1R , and C i1R of the following equation (1) representing the intensity ratio instrument sensitivity curve are obtained.
  • I i1bRT A i1R I i1bRM 2 +B i1R I i1bRM +C i1R (1)
  • the reference principal component b, the comparative principal component i1 and the subcomponent i2 are designated as the component i, and each component i For the unknown sample 1 whose content W i is unknown, the intensity I iM of the measurement line is measured.
  • the measured intensity I iM is converted to the theoretical intensity scale as shown in the following equation (16) to obtain the converted measured intensity IiTM .
  • IiTM AiIiM2 + BiIiM + Ci (16 )
  • the measured intensities I i1M , I i1M Based on I bM and the intensity ratio instrument sensitivity curve (formula (1)) in the intensity ratio instrument sensitivity curve creation step, the ratio of the measured intensity I i1M of the contrast principal component i1 to the measured intensity I bM of the reference principal component b A certain measured intensity ratio Ii1bRM is converted to a theoretical intensity scale as shown in the following equation (2) to obtain a converted measured intensity ratio Ii1bRTM .
  • I i1bRTM A i1R I i1bRM 2 +B i1R I i1bRM +C i1R (2)
  • initial values W i1 (0), W b (0), and W i2 (0) of the content rates of the respective components i1, b, and i2 are set.
  • the initial value W i (0) of the content rate is set for each component i as shown in the following equation (17).
  • the average content of each known component in a plurality of standard samples is obtained, and the initial value W i1 (0), W b (0), and W i2 (0) may be set, or the initial value W i1 ( 0), W b (0), and W i2 (0).
  • the setting of the initial value R i1b (0) of the content ratio in that case is also the same as described for the fluorescent X-ray spectrometer of the first embodiment.
  • the latest content W i (n-1) is calculated for each measurement line. Based on this, the theoretical intensity I iT (n-1) is calculated by a known theoretical intensity formula.
  • the subcomponent content rate update step for each subcomponent i2, the converted measured intensity I i2TM in the intensity conversion step and the unknown sample theoretical intensity calculation Based on the theoretical intensity I i2T (n-1) at the step, the content W i2 (n-1) is updated to W i2 (n) as in the following equation (13).
  • W i2 (n) W i2 (n ⁇ 1) ⁇ (I i2TM /I i2T (n ⁇ 1)) (13)
  • the converted measured intensities I i1TM and I bTM in the intensity conversion step and the theoretical intensities I i1T in the unknown sample theoretical intensity calculation step are calculated for the contrast principal component i1 and the reference principal component b. (n-1), I bT (n-1), from the latest content rates W i1 (n-1), W b (n-1), the following equations (18) and (19) Calculate the estimated contents W i1 (S) and W b (S) in .
  • R i1b (n) R i1b (n ⁇ 1) ⁇ (I i1bRTM /I i1bRT (n ⁇ 1)) (6)
  • the content rate W i1 (n-1) of the comparative principal component i1 and the content rate W b (n-1) of the reference principal component b are updated to the estimated content rate calculation step.
  • the latest content ratio R i1b (n), W i1 (n) and W b (n) obtained by the following equations (20) and (8) are updated.
  • convergence determination is performed based on a predetermined convergence condition. If (No) is determined, the procedure returns to the unknown sample theoretical strength calculation step, and if a predetermined convergence condition is satisfied, convergence (Yes) is determined, and the procedure proceeds to the result output step.
  • the latest content W i (n) is output as the content W i of the component i in the unknown sample 1 to be obtained. do.
  • the quantification means 13 using the fundamental parameter method calculates the ratio of the measured intensity Ii1M of the contrast principal component i1 to the measured intensity IbM of the reference principal component b.
  • the intensity ratio that is the correlation between a certain measured intensity ratio Ii1bRM and the theoretical intensity ratio Ii1bRT , which is the ratio of the theoretical intensity Ii1T of the contrasting principal component i1 to the theoretical intensity IbT of the reference principal component b, to create an intensity ratio instrument sensitivity curve.
  • a ratio instrument sensitivity curve creation step an intensity ratio conversion step of converting the measured intensity ratio Ii1bRM to a theoretical intensity scale based on the intensity ratio instrument sensitivity curve to obtain a converted measured intensity ratio Ii1bRTM , a comparison principal component i1 and a reference principal component b
  • An estimated content rate calculation step for calculating the estimated content rates W i1 (S) and W b (S) for the comparison principal component b with respect to the content rate W b (n ⁇ 1) of the reference principal component b based on the converted measured intensity ratio I i1bRTM
  • a content ratio update step of updating the content ratio R i1b (n-1), which is the ratio of the content ratio W i1 (n-1) of the component i1, to R i1b (n), and the estimated content W of the main component i1 Based on the sum of i1 (S) and the estimated content W b (S) of the reference principal component b and the latest content ratio R i1b (n), the content W i
  • the intensity ratio which is the correlation between the measured intensity ratio and the theoretical intensity ratio as shown in equation (1)
  • the instrument sensitivity is also utilized.
  • Such a quantification method is called a second component quantification method.
  • the quantification means 13 also supports the case where no subcomponent i2 is specified as the component i for the standard sample 14 and the unknown sample 1. In that case, Skip the subcomponent content rate update step.
  • the fluorescent X-ray spectrometer of the fourth embodiment will be explained.
  • a calibration curve method is used in the quantification means 13 provided.
  • the standard and unknown samples of interest contain only the main component.
  • the configuration of the X-ray fluorescence spectrometer of the fourth embodiment differs from the X-ray fluorescence spectrometers of the first to third embodiments only in the operation of the quantification means 13 provided.
  • the quantification means 13 determines a single reference principal component b as a reference principal component and a single or a plurality of contrasting principal components i1 to be contrasted with the reference principal component b.
  • i is designated as each component i (including b, i1), the content W i (including W b , W i1 ) of each component i is known, and the matrix correction from all components i
  • the intensity of the measurement line which is the fluorescent X-ray 5 corresponding to the component i, is measured with respect to the standard sample 14 for which the additional correction component j used for the measurement is specified.
  • the measured intensity IiM for the component i includes the measured intensity IbM for the reference principal component b and the measured intensity Ii1M for the contrast principal component i1.
  • a component that absorbs or excites the measurement line and affects the intensity of the measurement line corresponding to the analysis component i is the additional correction component j. Used for matrix correction. Any of the reference principal component b, the contrasting principal component i1, and the analysis component i itself can be the additional correction component j. .
  • the intensity ratio calibration curve constants d i1R , e i1R , f i1R and the intensity ratio matrix correction coefficient ⁇ jR of the following equation (21) representing the intensity ratio calibration curve are obtained.
  • the matrix correction coefficient for the conventional calibration curve which is the correlation between the measured intensity and the content rate, is obtained by theoretical intensity calculation, but this intensity ratio matrix
  • the correction coefficient ⁇ jR can also be obtained by theoretical strength calculation.
  • R i1b (d i1R I i1bRM 2 +e i1R I i1bRM +f i1R )(1+ ⁇ jR W j ) (21)
  • the reference principal component b and the comparative principal component i1 are designated as the component i, the content W i of each component i is unknown, and the additional correction component j is designated.
  • the intensity IiM of the measurement line is measured.
  • X Ri1b (d i1R I i1bRM 2 +e i1R I i1bRM +f i1R ) (22)
  • the uncorrected content ratio X Ri1b in the uncorrected content ratio calculation step is Based on this, uncorrected content rates X i1 and X b before matrix correction are calculated and set as initial values of content rates W i1 (0) and W b (0).
  • the uncorrected content ratio X Ri1b in the uncorrected content ratio calculation step is On the other hand, matrix correction is performed based on the content W j (n ⁇ 1) of the latest additional correction component j, and the content ratio is updated to R i1b (n).
  • the content rate W j (n ⁇ 1) of the latest addition correction component j the initial values W i1 (0), W b (0) is used, and the content rates W i1 (n-1) and W b (n-1) updated in the previous iterative calculation are used in the second and subsequent iterative calculations.
  • R i1b (n) X Ri1b (1+ ⁇ jR W j (n ⁇ 1)) (25)
  • the content ratios W i1 (n ⁇ 1) and W b (n ⁇ 1) of the respective components i1 and b are changed to the content ratios R i1b (n ) are updated to W i1 (n) and W b (n) obtained by the following equations (7) and (8).
  • W b (n) 100/(1+ ⁇ R i1b (n)) (7)
  • W i1 (n) R i1b (n) ⁇ W b (n) (8)
  • the convergence determination step convergence determination is performed based on a predetermined convergence condition, as in the fluorescent X-ray analyzers of the first to third embodiments. If the predetermined convergence condition is not satisfied, it is determined as unconverged (No) and the procedure returns to the content ratio update step, and if the predetermined convergence condition is satisfied, it is determined as converged (Yes). Advance the procedure to the result output step.
  • the latest content W i (n) is output as the content W i of the component i in the unknown sample 1 to be obtained. do.
  • the quantification means 13 using the calibration curve method determines the ratio of the measured intensity Ii1M of the contrast principal component i1 to the measured intensity IbM of the reference principal component b.
  • a matrix correction term ⁇ jR W j is a correlation between a certain measured intensity ratio I i1bRM and a content ratio R i1b that is the ratio of the content ratio W i1 of the contrasting principal component i1 to the content ratio W b of the reference principal component b.
  • An intensity ratio calibration curve creation step of creating an intensity ratio calibration curve including an uncorrected content ratio calculation step of calculating an uncorrected content ratio X Ri1b before matrix correction based on the intensity ratio calibration curve
  • Uncorrected content ratio X A content ratio update step for performing matrix correction on Ri1b based on the content ratio W j (n ⁇ 1) of the latest additional correction component j, and updating the content ratio to Ri1b (n);
  • Content rate update for updating the content rates W i1 (n-1) and W b (n-1) of the components i1 and b to W i1 (n) and W b (n) based on the ratio R i1b (n) Execute the step.
  • the intensity ratio calibration curve that is the correlation between the measured intensity ratio and the content ratio as shown in equation (21) is utilized, but the conventional calibration curve, which is a correlation between measured intensity and content, is not utilized.
  • Such a quantitative method is also included in the first component quantitative method.
  • the X-ray fluorescence spectrometer of the fifth embodiment uses the first component quantification method of the calibration curve method in the same manner as the X-ray fluorescence spectrometer of the fourth embodiment. It contains not only ingredients but also sub-ingredients.
  • a secondary component is, for example, a component with a low content rate and for which an intensity ratio calibration curve is not created for the corresponding measurement line.
  • the configuration of the X-ray fluorescence spectrometer of the fifth embodiment differs from the X-ray fluorescence spectrometers of the first to fourth embodiments only in the operation of the quantification means 13 provided. will be explained according to
  • the quantification means 13 includes a single reference principal component b as a reference principal component, a single or a plurality of contrasting principal components i1 to be contrasted with the reference principal component b, and a single One or more subcomponents i2 are designated as component i (including b, i1, i2), and the content W i (including W b , W i1 , W i2 ) of each component i is known Then, the intensity of the measurement line, which is the fluorescent X-ray 5 corresponding to the component i, is measured for the standard sample 14 in which the additional correction component j used for matrix correction is specified from the total component i.
  • the measured intensity I iM for component i encompasses the measured intensity I bM for the reference principal component b, the measured intensity I i1M for the contrast principal component i1, and the measured intensity I i2M for the minor component i2,
  • the reference principal component b, the comparative principal component i1, and the subcomponent i2 are all the component i whose content rate is to be quantified, that is, the analysis component i.
  • a component that absorbs or excites the measurement line and affects the intensity of the measurement line corresponding to the analysis component i is the additional correction component j. Used for matrix correction. Any of the reference principal component b, the contrasting principal component i1, the subcomponent i2, and the analysis component i itself can be the additional correction component j. specified by
  • the measured intensity Ii2M of the subcomponent i2 is calculated based on the known content Wi and the measured intensity IiM in the standard sample measurement step. and the content W i2 of the subcomponent i2, and a calibration curve including the matrix correction term ⁇ j W j is created.
  • the calibration curve constants d i2 , e i2 , f i2 and the matrix correction coefficient ⁇ j of the following equation (26) representing the calibration curve are obtained.
  • W i2 (d i2 I i2 M 2 +e i2 I i2 M +f i2 )(1+ ⁇ j W j ) (26)
  • R i1b (d i1R I i1bRM 2 +e i1R I i1bRM +f i1R )(1+ ⁇ jR W j ) (21)
  • the reference principal component b, the comparative principal component i1 and the subcomponent i2 are designated as component i, the content W i of each component i is unknown, and the additional correction component For the unknown sample 1 for which j is specified, the intensity IiM of the measurement line is measured.
  • the uncorrected content ratio X Ri1b before matrix correction is calculated as shown in the following equation (22).
  • X Ri1b (d i1R I i1bRM 2 +e i1R I i1bRM +f i1R ) (22)
  • the comparison principal component i1 and the reference principal component b are uncorrected in the uncorrected content ratio calculation step.
  • Uncorrected content rates X i1 and X b before matrix correction are calculated and contained based on the content rate ratio X Ri1b and the uncorrected content rates X i2 of the subcomponents in the subcomponent content rate initial value setting step Set as initial values W i1 (0) and W b (0) of the rates.
  • the uncorrected content rate Xi2 in the subcomponent content rate initial value setting step is changed for each subcomponent i2 as shown in the following equation (29).
  • matrix correction is performed based on the content W j (n ⁇ 1) of the latest additional correction component j, and the content is updated to W i2 (n).
  • the main component content rate W i2 (n ⁇ 1) of the latest additional correction component j the initial value W i2 (0) in the secondary component content rate initial value setting step
  • the main component content rate The initial values W i1 (0) and W b (0) in the rate initial value setting step are used, and after the second iterative calculation, the content rate W i2 (n-1) updated in the previous iterative calculation , W i1 (n-1), W b (n-1) are used.
  • the uncorrected content ratio X Ri1b in the uncorrected content ratio calculation step is converted into the subcomponent Matrix correction is performed based on the latest content rate W j (n-1) of the additional correction component j used in the content rate update step, and the content rate ratio is updated to R i1b (n).
  • R i1b (n) X Ri1b (1+ ⁇ jR W j (n ⁇ 1)) (25)
  • the content ratios W i1 (n ⁇ 1) and W b (n ⁇ 1) of the comparison principal component i1 and the reference principal component b are updated in the content ratio updating step.
  • W i1 (n), W obtained by the following equations (14) and (8) based on the ratio R i1b (n) and the content rate W i2 (n) of the subcomponent updated in the subcomponent content rate updating step Update to b (n).
  • the convergence determination step convergence determination is performed based on a predetermined convergence condition, as in the fluorescent X-ray analyzers of the first to fourth embodiments. If the predetermined convergence condition is not satisfied, it is determined as unconverged (No) and the procedure returns to the subcomponent content rate update step, and if the predetermined convergence condition is satisfied, it is determined as converged (Yes). to advance the procedure to the result output step.
  • a predetermined convergence condition as in the fluorescent X-ray analyzers of the first to fourth embodiments.
  • the latest content W i (n) is output as the content W i of the component i in the unknown sample 1 to be obtained. do.
  • the quantification means 13 using the calibration curve method determines the ratio of the measured intensity Ii1M of the contrast principal component i1 to the measured intensity IbM of the reference principal component b.
  • a matrix correction term ⁇ jR W j is a correlation between a certain measured intensity ratio I i1bRM and a content ratio R i1b that is the ratio of the content ratio W i1 of the contrasting principal component i1 to the content ratio W b of the reference principal component b.
  • An intensity ratio calibration curve creation step of creating an intensity ratio calibration curve including an uncorrected content ratio calculation step of calculating an uncorrected content ratio X Ri1b before matrix correction based on the intensity ratio calibration curve
  • Uncorrected content ratio X A content ratio update step for performing matrix correction on Ri1b based on the content ratio W j (n ⁇ 1) of the latest additional correction component j, and updating the content ratio to Ri1b (n);
  • Content ratios W i1 (n-1) and W b (n-1) of the contrast principal component i1 and the reference principal component b are updated to W i1 (n) and W b (n) based on the ratio R i1b (n)
  • Execute the principal component content rate update step By performing these steps, which were not present in the conventional calibration curve method algorithm, a sufficiently accurate analysis of the content ratio R i1b between the main components is made.
  • the X-ray fluorescence spectrometer of the sixth embodiment uses the second component quantification method of the calibration curve method, which will be described later.
  • the target standard sample and unknown sample contain not only main components but also subcomponents.
  • the configuration of the X-ray fluorescence analysis apparatus of the sixth embodiment only the operation of the quantification means 13 provided differs from that of the X-ray fluorescence analysis apparatus of the first to fifth embodiments. will be explained according to
  • the quantification means 13 first compares a single reference principal component b, which is a reference principal component, with the reference principal component b in the standard sample measurement step, similarly to the fluorescent X-ray spectrometer of the fifth embodiment.
  • the single or multiple contrasting principal components i1 and the single or multiple minor components i2 are designated as components i (including b, i1, i2), and the content W i (W b , W i1 , and W i2 ) are known, and an additional correction component j used for matrix correction is designated from all components i. Measure the intensity of the line.
  • the calibration curve creation step the correlation between the measured intensity I iM and the content rate W i is calculated based on the known content rate W i and the measured intensity I iM in the standard sample measurement step for each measurement line. to prepare a calibration curve including the matrix correction term ⁇ j W j . Specifically, the calibration curve constants d i , e i , f i and the matrix correction coefficient ⁇ j of the following equation (30) representing the calibration curve are obtained.
  • An intensity ratio calibration curve is generated that includes the matrix correction term ⁇ jR W j .
  • the intensity ratio calibration curve constants d i1R , e i1R , f i1R and the intensity ratio matrix correction coefficient
  • R i1b (d i1R I i1bRM 2 +e i1R I i1bRM +f i1R )(1+ ⁇ jR W j ) (21)
  • the reference principal component b, the comparative principal component i1 and the subcomponent i2 are designated as the component i, and each component i
  • the intensity IiM of the measurement line is measured for the unknown sample 1 whose content W i is unknown and for which the additional correction component j is specified.
  • the uncorrected content rate X i before matrix correction is calculated and set as the initial value W i (0) of the content rate.
  • the uncorrected content ratio X Ri1b before matrix correction is calculated as shown in the following equation (22).
  • X Ri1b (d i1R I i1bRM 2 +e i1R I i1bRM +f i1R ) (22)
  • the uncorrected content ratio X i1 , X b are subjected to matrix correction based on the latest content W j (n ⁇ 1) of the additional correction component j used in the secondary component content rate update step, and the estimated content rates W i1 (S), W Calculate b (S)
  • W i1 (S) X i1 (1+ ⁇ j W j (n ⁇ 1)) (32)
  • W b (S) X b (1+ ⁇ j W j (n ⁇ 1)) (33)
  • R i1b (n) X Ri1b (1+ ⁇ jR W j (n ⁇ 1)) (25)
  • the content rate W i1 (n-1) of the comparative principal component i1 and the content rate W b (n-1) of the reference principal component b are updated to the estimated content rate calculation step.
  • W Total (S) ⁇ W i1 (S)+W b (S)
  • the content ratio R i1b (n) updated in the content ratio update step W i1 (n) and W b (n) obtained by the following equations (20) and (8) ).
  • the convergence determination step convergence determination is performed based on a predetermined convergence condition, as in the fluorescent X-ray analyzers of the first to fifth embodiments. If the predetermined convergence condition is not satisfied, it is determined as unconverged (No) and the procedure returns to the subcomponent content rate update step, and if the predetermined convergence condition is satisfied, it is determined as converged (Yes). to advance the procedure to the result output step.
  • a predetermined convergence condition as in the fluorescent X-ray analyzers of the first to fifth embodiments.
  • the latest content W i (n) is output as the content W i of the component i in the unknown sample 1 to be obtained. do.
  • the quantification means 13 using the calibration curve method determines the ratio of the measured intensity Ii1M of the contrast principal component i1 to the measured intensity IbM of the reference principal component b.
  • a matrix correction term ⁇ jR W j is a correlation between a certain measured intensity ratio I i1bRM and a content ratio R i1b that is the ratio of the content ratio W i1 of the contrasting principal component i1 to the content ratio W b of the reference principal component b.
  • An intensity ratio calibration curve creation step of creating an intensity ratio calibration curve including an uncorrected content ratio calculation step of calculating an uncorrected content ratio X Ri1b before matrix correction based on the intensity ratio calibration curve, a comparison principal component i1 and a reference
  • the uncorrected content rates X i1 and X b of the main component b are subjected to matrix correction based on the latest content rate W j (n ⁇ 1) of the additional correction component j, and the estimated content rates W i1 (S) and W
  • An estimated content rate calculation step for calculating b (S) the uncorrected content rate X Ri1b is subjected to matrix correction based on the content rate W j (n-1) of the latest addition correction component j, and the content rate ratio to R i1b (n), the sum of the estimated content W i1 (S) of the contrast principal component i1 and the estimated content W b (S) of the reference principal component b and the latest content ratio Based on R i1b (n
  • the intensity ratio calibration curve that is the correlation between the measured intensity ratio and the content ratio as shown in equation (21) for the main component
  • a conventional calibration curve which is a correlation between measured intensity and content as shown in equation (30) is also used.
  • Such a quantitative method is also included in the second component quantitative method.
  • the quantification means 13 also supports the case where no subcomponent i2 is specified as the component i for the standard sample 14 and the unknown sample 1. In that case, Skip the subcomponent content rate update step.
  • the iterative calculation starts from the estimated content ratio calculation step.
  • j (n-1) as described in the description of the secondary component content rate update step, in the first iteration, the initial values W i2 (0), W i1 (0), W b (0) are used, and in the second and subsequent iterative calculations, the content rates W i2 (n-1), W i1 (n-1), W b updated in the previous iterative calculation (n-1) is used.
  • the quantification means 13 uses the measured intensity in the standard sample measurement step and the measured intensity IiM in the unknown sample measurement step as Based on the correlation between the height and the measured intensity, the measured intensity may be corrected to remove the influence of the height variation of the analysis surface of the sample 1, 14 on the measured intensity.
  • the measured intensity may be corrected to remove the influence of the height variation of the analysis surface of the sample 1, 14 on the measured intensity.
  • more accurate analysis of the content ratio Ri1b between the main components can be made by performing the height correction in this way.
  • the sum of the content ratios W i (n) of all components i is set to 100 ( mass%).

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Abstract

Un dispositif d'analyse par fluorescence X, selon la présente invention, comprend un moyen quantitatif (13) qui utilise le procédé FP, le moyen quantitatif (13) exécutant : une étape de création de courbe de sensibilité d'instrument de rapport d'intensité pour créer une courbe de sensibilité d'instrument de rapport d'intensité qui est une corrélation entre un rapport d'intensité mesurée, qui est le rapport de l'intensité mesurée du composant principal de contraste à l'intensité mesurée d'un composant principal de référence, et un rapport d'intensité théorique, qui est le rapport de l'intensité théorique du composant principal de contraste à l'intensité théorique du composant principal de référence ; une étape de conversion de rapport d'intensité pour convertir le rapport d'intensité mesurée en une échelle d'intensité théorique sur la base de la courbe de sensibilité d'instrument de rapport d'intensité pour obtenir un rapport d'intensité mesurée converti ; une étape de mise à jour de rapport de teneur pour mettre à jour le rapport de teneur, qui est le rapport entre la teneur du composant principal de contraste à la teneur du composant principal de référence, sur la base du rapport d'intensité mesurée converti ; et une étape de mise à jour de teneur pour mettre à jour la teneur de chaque composant sur la base du dernier rapport de teneur.
PCT/JP2022/011202 2021-06-08 2022-03-14 Dispositif d'analyse par fluorescence x Ceased WO2022259667A1 (fr)

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Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000304711A (ja) * 1999-04-19 2000-11-02 Rigaku Industrial Co 蛍光ｘ線分析装置およびこれに使用する記録媒体
JP2000310602A (ja) * 1999-02-23 2000-11-07 Rigaku Industrial Co 蛍光ｘ線分析装置およびこれに使用する記録媒体
JP2002082075A (ja) * 2000-09-08 2002-03-22 Tdk Corp 蛍光ｘ線分析装置及び蛍光ｘ線分析方法
JP2012068084A (ja) * 2010-09-22 2012-04-05 E & M:Kk Ｘ線分析方法，ｘ線分析装置及びそのプログラム
JP2015031555A (ja) * 2013-08-01 2015-02-16 田中貴金属工業株式会社 蛍光ｘ線分析装置を用いた貴金属製品の分析方法、及び、貴金属製品分析用のコンピュータプログラム
WO2015056304A1 (fr) * 2013-10-15 2015-04-23 株式会社島津製作所 Procédé et dispositif d'analyse par fluorescence x
JP2017026511A (ja) * 2015-07-24 2017-02-02 株式会社リガク 蛍光ｘ線分析装置
WO2018168939A1 (fr) * 2017-03-15 2018-09-20 株式会社リガク Procédé d'analyse par fluorescence des rayons x, programme d'analyse par fluorescence des rayons x et dispositif d'analyse par fluorescence des rayons x
JP2020165757A (ja) * 2019-03-29 2020-10-08 株式会社リガク 蛍光ｘ線分析装置
JP2021051053A (ja) * 2019-09-26 2021-04-01 株式会社リガク 蛍光ｘ線分析装置

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101059456A (zh) * 2007-05-31 2007-10-24 中国铝业股份有限公司 一种x射线荧光光谱法测定氟化铝中元素的方法
JP6944730B2 (ja) * 2020-02-12 2021-10-06 株式会社リガク 定量分析方法、定量分析プログラム及び蛍光ｘ線分析装置
JP7130267B2 (ja) * 2020-09-03 2022-09-05 株式会社リガク 全反射蛍光ｘ線分析装置及び推定方法

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000310602A (ja) * 1999-02-23 2000-11-07 Rigaku Industrial Co 蛍光ｘ線分析装置およびこれに使用する記録媒体
JP2000304711A (ja) * 1999-04-19 2000-11-02 Rigaku Industrial Co 蛍光ｘ線分析装置およびこれに使用する記録媒体
JP2002082075A (ja) * 2000-09-08 2002-03-22 Tdk Corp 蛍光ｘ線分析装置及び蛍光ｘ線分析方法
JP2012068084A (ja) * 2010-09-22 2012-04-05 E & M:Kk Ｘ線分析方法，ｘ線分析装置及びそのプログラム
JP2015031555A (ja) * 2013-08-01 2015-02-16 田中貴金属工業株式会社 蛍光ｘ線分析装置を用いた貴金属製品の分析方法、及び、貴金属製品分析用のコンピュータプログラム
WO2015056304A1 (fr) * 2013-10-15 2015-04-23 株式会社島津製作所 Procédé et dispositif d'analyse par fluorescence x
JP2017026511A (ja) * 2015-07-24 2017-02-02 株式会社リガク 蛍光ｘ線分析装置
WO2018168939A1 (fr) * 2017-03-15 2018-09-20 株式会社リガク Procédé d'analyse par fluorescence des rayons x, programme d'analyse par fluorescence des rayons x et dispositif d'analyse par fluorescence des rayons x
JP2020165757A (ja) * 2019-03-29 2020-10-08 株式会社リガク 蛍光ｘ線分析装置
JP2021051053A (ja) * 2019-09-26 2021-04-01 株式会社リガク 蛍光ｘ線分析装置

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