DE1948185A1 - Continuous measuring equipment for halogen - concentration in gas mixtures - Google Patents
Continuous measuring equipment for halogen - concentration in gas mixturesInfo
- Publication number
- DE1948185A1 DE1948185A1 DE19691948185 DE1948185A DE1948185A1 DE 1948185 A1 DE1948185 A1 DE 1948185A1 DE 19691948185 DE19691948185 DE 19691948185 DE 1948185 A DE1948185 A DE 1948185A DE 1948185 A1 DE1948185 A1 DE 1948185A1
- Authority
- DE
- Germany
- Prior art keywords
- halogen
- halogens
- concentration
- cathode
- noble metal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 229910052736 halogen Inorganic materials 0.000 title claims abstract description 16
- 150000002367 halogens Chemical class 0.000 title claims abstract description 16
- 239000000203 mixture Substances 0.000 title 1
- 239000007789 gas Substances 0.000 claims description 11
- 229910000510 noble metal Inorganic materials 0.000 claims description 7
- 238000005259 measurement Methods 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 5
- 229910052697 platinum Inorganic materials 0.000 abstract description 5
- 229910052741 iridium Inorganic materials 0.000 abstract description 4
- 229910052763 palladium Inorganic materials 0.000 abstract description 4
- 229910052737 gold Inorganic materials 0.000 abstract description 2
- 229910052758 niobium Inorganic materials 0.000 abstract description 2
- 239000010970 precious metal Substances 0.000 abstract 3
- 239000012811 non-conductive material Substances 0.000 abstract 1
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 8
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 description 4
- 150000002500 ions Chemical class 0.000 description 2
- GKOZUEZYRPOHIO-UHFFFAOYSA-N iridium atom Chemical compound [Ir] GKOZUEZYRPOHIO-UHFFFAOYSA-N 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 150000002366 halogen compounds Chemical class 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000010955 niobium Substances 0.000 description 1
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/62—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating the ionisation of gases, e.g. aerosols; by investigating electric discharges, e.g. emission of cathode
- G01N27/626—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating the ionisation of gases, e.g. aerosols; by investigating electric discharges, e.g. emission of cathode using heat to ionise a gas
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Other Investigation Or Analysis Of Materials By Electrical Means (AREA)
Abstract
Description
Verfahren und Vorrichtung zum kontinuierlichen Messen von Halogenen Gegenstand der Erfindung ist ein Verfahren und eine Vorrichtung zur kontinuierlichen Konzentrationsmessung von Halogenen bzw. halogenhaltigen Gasen und Dämpfen.Method and device for the continuous measurement of halogens The invention is a method and a device for continuous Concentration measurement of halogens or gases and vapors containing halogens.
Es ist bereits die Halogenlecksuchmethode bekannt. Sie beruht darauf, dass beim Auftreffen von Halogenen oder Halogenverbindungen auf eine glühende Platin-Anode positive Ionen emittiert werden, deren Menge ein Mass für die Leckrate ist. Diese Geräte eignen sich nicht zur kontinuierlichen Konzentrationsmessung von Halogenen bzw, halogenhaltigen Gasen und Dämpfen.The halogen leak detection method is already known. It is based on that when halogens or halogen compounds hit a glowing platinum anode positive ions are emitted, the amount of which is a measure of the leak rate. These Devices are not suitable for continuous measurement of the concentration of halogens or halogen-containing gases and vapors.
Es wurde nun ein Verfahren zur kontinuierlichen Konzentrationsmessung vC>n Halogenen bzw. halogenhaltigen Gasen und Dämpfen gefunden, das dadurch gekennzeichnet ist, dass man die zu messenden Halogen-Moleküle an einer heissen Edelmetall-Kathode, vorzugsweise aus Platin, zu Atomen dissoziiert, ihnen Elektronen anlagert und sie in einem Potentialfeid von - )rOO V beschleunigt.There has now been a method for continuous concentration measurement vC> n halogens or gases and vapors containing halogens found, which is characterized by this is that the halogen molecules to be measured are attached to a hot noble metal cathode, preferably made of platinum, dissociated into atoms, electrons attached to them and they accelerated in a potential field of -) rOO V.
Zur Durchführung des Verfahrens eignet slch ein nicht leitender Behälter (Messzelle), der mit einem Ein- und Auslass für das zu mc:;:;ene Gas versehen ist und worin eine beheizte Edelmetall-Kathode und eine Edelmetall-Anode in bekannter Weise angeordnet sind.A non-conductive container is suitable for carrying out the process (Measuring cell), which is provided with an inlet and outlet for the gas to be mc:;:; ene and wherein a heated noble metal cathode and a noble metal anode in known Way are arranged.
Die Figur zeigt ein Schaltbild einer Messvorrichtung in beispielsweiser Ausführung.The figure shows a circuit diagram of a measuring device in an example Execution.
Das in Bezug auf Halogene zu untersuchende Cas strömt kontinu@erlich durch einen Gaseinlass (9) in eine Messzelle (1), deren Gehause (10)nicht leitend ist und verlässt die Messzelle durch den Gasauslass (11). Die im Gas mitgeführten Halogenmoleküle werden an der heissen Edelmetall-Kathode (2), die z.B. aus Platin, Palladium, Palladium/Iridium, Iridium/Niob oder Gold bestehen kann, negativ ionisiert und von der gegenüber der Kathode angeordneten positiven Platin-Anode (3) angezogen. Der halogenproportionale negative Ionenstrom fliesst über einen hochohmigen Arbeitswiderstand (4) und erzeugt so einen Spannungsabfall, der nach entsprechender Verstärkung (5) mit einem Messgerät (6) angezeigt werden kann. Der Messeffekt ist dabei unter anderem abhängig von Materialart, Oberfläche und Temperatur der Kathode sowie dem Elektrodenabstand; ferner von der elektrischen Feldstärke zwischen den Elektroden und der Gasmenge pro Stünde, die durch die Messzelle strömt.The Cas to be examined with regard to halogens flows continuously through a gas inlet (9) into a measuring cell (1), their housing (10) is not conductive and leaves the measuring cell through the gas outlet (11). the Halogen molecules carried along in the gas are deposited on the hot noble metal cathode (2), which consist e.g. of platinum, palladium, palladium / iridium, iridium / niobium or gold can, negatively ionized and from the positive opposite the cathode Platinum anode (3) tightened. The halogen-proportional negative ion current flows via a high-ohmic working resistor (4) and thus generates a voltage drop, which are displayed with a measuring device (6) after the corresponding amplification (5) can. The measuring effect depends, among other things, on the type of material and surface and temperature of the cathode and the electrode spacing; also from the electrical one Field strength between the electrodes and the amount of gas per hour passing through the measuring cell flows.
Ei.n Teil dieser Einflussgrössen ist durch Auslegung der Messzelle festgelegt4 Die Temperatur der Kathode lässt sich in bekannter Weise durch einen Regelwiderstand (12) im Heizstromkreis, die elektrische Feldstärke durch Ändern der Saugspannung (8) variieren. Der Gasdurchfluss ist ebenfalls mit bekannten Mitteln regelbar.One part of these influencing variables is the design of the measuring cell determined4 The temperature of the cathode can be determined in a known manner by a Variable resistor (12) in the heating circuit, the electric field strength by changing the suction tension (8) vary. The gas flow is also by known means adjustable.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19691948185 DE1948185A1 (en) | 1969-09-24 | 1969-09-24 | Continuous measuring equipment for halogen - concentration in gas mixtures |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19691948185 DE1948185A1 (en) | 1969-09-24 | 1969-09-24 | Continuous measuring equipment for halogen - concentration in gas mixtures |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE1948185A1 true DE1948185A1 (en) | 1971-04-01 |
Family
ID=5746309
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE19691948185 Pending DE1948185A1 (en) | 1969-09-24 | 1969-09-24 | Continuous measuring equipment for halogen - concentration in gas mixtures |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE1948185A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2337885A1 (en) * | 1976-01-08 | 1977-08-05 | Westinghouse Electric Corp | ALKALINE IONIZATION DETECTOR |
| EP0015495A1 (en) * | 1979-02-27 | 1980-09-17 | Hewlett-Packard Company | Electron capture detector |
-
1969
- 1969-09-24 DE DE19691948185 patent/DE1948185A1/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2337885A1 (en) * | 1976-01-08 | 1977-08-05 | Westinghouse Electric Corp | ALKALINE IONIZATION DETECTOR |
| EP0015495A1 (en) * | 1979-02-27 | 1980-09-17 | Hewlett-Packard Company | Electron capture detector |
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