TW202332899A - Ammonia gas detection system and ammonia gas detection method - Google Patents

Abstract

An ammonia gas detection system includes a sample device and a color comparison device. The sample device includes a sample accommodation tank and a sample detection element. The sample accommodation tank is adapted for introducing gases. The sample detection element is accommodated in a sample accommodation tank, wherein the sample detection element includes a color displaying part, and the color displaying part includes methyl orange. The color comparison device is adjacent to the sample device. The color comparison device captures a color image of the color displaying part and a hue value thereof, and the color comparison device obtains an ammonia gas concentration value corresponding to the hue value based on the hue value. As a result, the ammonia gas detection system according to the invention can measure the ammonia gas concentration value as low as 0.006 ppmv-0.054 ppmv of sub-ppmv levels in real-time, and thus can be used to prevent the human body from potential dangers caused by being exposed to ammonia gas of ppmv levels.

Description

Ammonia gas detection system and ammonia gas detection method

The present invention relates to an ammonia gas detection method, in particular to a color change of the reaction between ammonia gas and methyl orange in a permeating gas and the correction between the hue value and the ammonia gas concentration value, thereby obtaining the ammonia gas concentration value in the gas. Ammonia detection method. The present invention also relates to an ammonia gas detection system, particularly an ammonia gas detection system that detects the ammonia gas concentration value in the gas through the above ammonia gas detection method.

Ammonia gas (chemical formula: NH ₃ ) and/or its derivatives are chemical substances that are commonly used in fertilizers, animal feeds, drugs, dyes, surfactants, etc. However, it is also a potentially dangerous substance. For example, if the human body is exposed to ammonia gas reaching a certain concentration and for a certain period of time, it may cause irritation to the human body's eyes, throat and nose, and may even be fatal. . In this regard, for example, the American Conference of Industrial Hygienists (ACGIH) has established monitoring and exposure standards for ammonia content in the air: exposure must only be to an environment containing an ammonia concentration of 25.0 ppmv8 hours; and only exposed to an environment containing ammonia gas at a concentration of 35.0 ppmv for 15 minutes.

In addition, ammonia may also form volatile organic compounds (VOCs), which may have a negative impact on air quality. For example, when ammonia reacts with methanol, it may produce methylamine, dimethylamine, trimethylamine and other chemical substances that contain a large number of hydrogen bonds and can react with other gases to form fine particles, thus causing fine suspended particles in the air ( The concentration of PM2.5) increased.

In view of this, some embodiments of the present invention provide an ammonia gas detection system, which includes a sample device and a color comparison device. The above-mentioned sample device includes a sample holding tank and a sample detection part. The above-mentioned sample holding tank is suitable for introducing gas. The above-mentioned sample detection piece is accommodated in the sample containing tank, wherein the above-mentioned sample detection piece includes a coloring part, and the above-mentioned coloring part contains methyl orange. The above-mentioned color comparison device is installed adjacent to the sample device, and the above-mentioned color comparison device captures the color image of the color part and its hue value, and obtains the ammonia concentration value corresponding to the hue value based on the hue value.

According to some embodiments, the ammonia concentration value is 6 ppbv-54 ppbv.

According to some embodiments, the above-mentioned color comparison device includes an image capturing component and a concentration reading component. The above-mentioned image capture unit captures the color image of the color rendering part. The above-mentioned concentration judgment component captures the hue value of the color image, and the above-mentioned concentration judgment component obtains the ammonia gas concentration value corresponding to the hue value based on the hue value.

According to some embodiments, the above-mentioned color comparison device includes an image display element. The above image display element displays at least one of a colored image and an ammonia concentration value.

According to some embodiments, the above-mentioned sample holding tank has a sample access portion. The above-mentioned sample inlet part is suitable for connecting the sample inlet piece, so as to introduce gas to the sample holding tank through the sample inlet piece.

According to some embodiments, the above-mentioned sample device further includes a cover. The above-mentioned cover body and the sample holding tank form a sealed space, and the sample detection piece is housed in the sealed space.

In addition, some embodiments of the present invention also provide an ammonia gas detection method, which includes the following steps: placing a sample detection piece in a sample holding tank, wherein the sample detection piece contains methyl orange; passing gas into the sample container Set the tank; and capture the color image and the hue value of the sample detection piece through the color comparison device, so as to obtain the ammonia concentration value corresponding to the hue value based on the hue value.

According to some embodiments, before the step of introducing gas into the sample holding tank in the above ammonia gas detection method, the following step is further included: sealing the sample holding tank.

According to some embodiments, in the ammonia detection method, the ammonia concentration value is calculated through a calibration curve of the hue value versus the ammonia concentration value, and the ammonia concentration value is 6 ppbv-54 ppbv.

Therefore, in some embodiments of the present invention, the reaction between ammonia and methyl orange in the gas passes through the color change, and the correction conversion between the hue value of the color image and the ammonia concentration value of the color change , the ammonia concentration value contained in the gas can be obtained. The ammonia concentration value obtained by the above detection method can even be as low as the ppbv level (that is, the "sub-ppmv (sub-ppmv)" level) concentration value, which is beneficial to detecting the ammonia content as low as the ppbv concentration level. Therefore, through the ammonia gas detection system and/or ammonia gas detection method of some embodiments of the present invention, ammonia gas concentration values at very low concentration levels can be detected immediately, thereby preventing human body from being exposed to harmful or fatal hazards. Ammonia atmosphere.

The detailed features and advantages of the present invention are described in detail below in the implementation mode. The content is sufficient to enable anyone skilled in the relevant art to understand the technical content of the present invention and implement it accordingly. Based on the content disclosed in this specification, the patent scope and the drawings, , anyone familiar with the relevant art can easily understand the objectives and advantages related to the embodiments of the present invention.

The following is supplemented by drawings to explain each embodiment more clearly.

Please refer to FIGS. 1 and 2 , which respectively illustrate a perspective view of an ammonia gas detection system 1 according to some embodiments. In FIG. 1 and FIG. 2 , an ammonia gas detection system 1 includes a sample device 10 and a color comparison device 12 . The sample device 10 includes a sample storage tank 102 and a sample detection component 104 .

The sample holding tank 102 is suitable for introducing gas, wherein the gas may include ammonia and other gases other than ammonia (such as nitrogen, oxygen or carbon dioxide commonly found in the atmosphere); in other words, the gas may not contain ammonia. It only contains other gases other than ammonia; this is only to illustrate the possible embodiments of the above gases and is not intended to limit the present invention. The sample detection piece 104 is accommodated in the sample containing tank 102 . The sample detection part 104 includes a coloring part 1042, and the coloring part 1042 is any component containing methyl orange. For example, the coloring part 1042 is a paper-based, ceramic or polymer material containing methyl orange, or It is a salt tablet made of pressed methyl orange and salt. Among them, the methyl orange described in this article is an acid-base indicator of methyl orange; for example, methyl orange can be a methyl orange solution in solution form, such as a solution containing methyl orange. Aqueous solution of acid-base indicator (hereinafter referred to as methyl orange aqueous solution). The methyl orange described in this article refers to methyl orange with an acid dissociation constant (abbreviated as pKa) of 3.47, and the pH value range in which it can produce color changes is 3.1-4.4. For example, taking methyl orange aqueous solution as an example, when the methyl orange aqueous solution comes into contact with an environment with a pH value of less than 3.1, the methyl orange aqueous solution will turn red; when the methyl orange aqueous solution comes into contact with an environment with a pH value greater than 4.4 When the methyl orange aqueous solution is exposed to an environment with a pH value between 3.1 and 4.4, the methyl orange aqueous solution will turn orange between red and yellow. Among them, if the pH value of the environment is closer to 3.1, its color will be more reddish-orange, and if the pH value of the environment is closer to 4.4, its color will be more yellow-orange.

The color comparison device 12 can be any device with functions such as image capture, numerical calculation, and comparison, such as a smart phone or a tablet computer. The possible embodiments of the above color comparison device 12 are only illustrated here. It is not intended to limit the invention. The color comparison device 12 is disposed adjacent to the sample device 10 to capture the color image of the color portion 1042 of the sample detection piece 104 and the hue value of the color image. The hue value used in this article refers to the hue in the HSL (hue-saturation-lightness) system and/or the HSV (hue-saturation-value) system (H), a name that can be used to distinguish colors of different wavelengths, and is not easily affected by saturation, brightness or lightness to produce different interpretation results (i.e. hue values) for different hues. Therefore, the hue value can be obtained by detecting the color image, and based on the hue value, the color corresponding to the specific wavelength of the color image can be known. Even by observing the change of the hue value, you can know whether the hue and its corresponding color have changed. Therefore, by observing the change of the hue value of methyl orange, you can know whether the color of methyl orange has changed. , and then know whether the pH value of the environment in which methyl orange, as an acid-base indicator, is exposed changes. The color comparison device 12 then calculates the pH value and/or the ammonia concentration value corresponding to the hue value based on the relationship between the hue value of the color image and the pH value (and/or the ammonia concentration value). . Thereby, by injecting gas into the ammonia detection system of some embodiments of the present invention, it is possible to instantly know whether the gas contains ammonia, and to further accurately determine the ammonia concentration value contained in the gas. Therefore, the ammonia gas detection system of some embodiments of the present invention can be used to prevent human beings from being exposed to harmful or fatal ammonia gas environments (such as chicken farms or livestock farms).

In Figure 1, according to some embodiments, the sample holding tank 102 includes a tank bottom 1022 and a plurality of tank wall portions 1024, where part of the tank wall portion 1024 and the tank bottom 1022 are connected to each other, and two adjacent tank wall portions 1024 are connected to each other. connected to form a closed space 1020 in which the sample detection component 104 can be placed. In some embodiments, the sample device 10 further includes a cover 108 , wherein the cover 108 is connected to the sample receiving tank 102 to form a sealed space 1020 in which the sample detection component 104 can be placed. The connection method between the above-mentioned components only needs to be able to form a closed space 1020, and is not particularly limited; for example, the above-mentioned connection method is a detachable or permanently fixed method, such as integral forming, welding or adhesive. catch. The above-mentioned cover 108 is made of a light-transmissive material (such as glass) and is translucent or completely transparent, thereby allowing the color comparison device 12 as shown in FIG. 2 to capture the color from the closed space 1020 and pass through the cover. 108 of light, and then obtain the color image of the color rendering part 1042.

In FIG. 1 , according to some embodiments, the sample holding tank 102 has a sample inlet 1026 , wherein the sample inlet 1026 is adapted to be connected to a sample inlet 106 to pass gas into the sample container through the sample inlet 106 . Place slot 102. The sample inlet 1026 can be various components that can be connected and introduced into the gas, such as plugs made of elastic materials (such as rubber and silicone), injection sleeves or sleeves, etc. The sample access component 106 can be any component with a gas access function, such as a syringe with a needle, an empty barrel, and a piston. The syringe can also be equipped with a micro-injection pump that can continuously or batch-inject gas. (syringe pump), to control the volume of gas introduced. For example, in FIG. 1 , the sample inlet 106 is a syringe with a needle, and the sample inlet 1026 is a plug made of silicone that is disposed on any groove wall 1024 . The sample inlet 1026 can therefore be used multiple times. Repeated insertion and removal of the sample inlet 106 can still maintain the sealed space 1020 at a certain degree of airtightness. Thereby, through the arrangement of the sample inlet portion 1026 and the corresponding sample inlet piece 106, gas can be introduced into the sample holding tank 102 at any time when detection is needed, so as to perform real-time detection. In addition, the sample holding tank 102 and its sample access portion 1026 can be reused, which is relatively environmentally friendly and can thus save the cost of multiple tests.

Please refer to FIG. 1 and FIG. 3A. FIG. 3A illustrates a perspective view of the sample detection component 104 according to some embodiments. In FIG. 1 and FIG. 3A , in addition to the aforementioned coloring part 1042 , the sample detection part 104 also includes a base part 1044 . The base portion 1044 can be made of a material with a supporting function, such as hard materials such as plastic and glass. The coloring part 1042 is disposed on the base part 1044 to support and fix the coloring part 1042 and maintain the flatness of the coloring part 1042 to facilitate observation of the coloring of the coloring part 1042 and capture of the coloring. Colored image of color part 1042. Please refer again to FIG. 3B , which illustrates a perspective view of the sample detection component 104 according to some embodiments. In FIG. 3B , in addition to the aforementioned coloring part 1042 and base part 1044 , the sample detection part 104 also includes a fixing part 1046 . The fixing part 1046 may be a material that has the function of fixing one component to another component, such as tape or adhesive and other materials that have adhesion and fixation functions. The fixing part 1046 is, for example, adhesive and is disposed between the coloring part 1042 and the base part 1044, or the fixing part 1046 is, for example, adhesive tape and is disposed on part of the coloring part 1042 and the base part 1044 (see Figure 3B). Thereby, the coloring part 1042 can be more firmly fixed to the base part 1044 and prevent the coloring part 1042 from loosening from the base part 1044. At the same time, through the arrangement of the fixing part 1046, the methyl orange contained in the coloring part 1042 can also be prevented from leaking out, thereby affecting the coloring function of the coloring part 1042.

As mentioned above, the coloring part 1042 can be a component containing methyl orange. For example, the coloring part 1042 is made of paper-based, ceramic or polymer material containing methyl orange, or is made of methyl orange and Salt flakes made from pressed salt. For example, please refer to FIG. 6 , which is a schematic flowchart of a method 3 for preparing the sample detection part 104 and its coloring part 1042 according to some embodiments. In Figure 6, when the colored part 1042 is a paper base material containing methyl orange, the colored part 1042 can be prepared through the following steps: in step 30, obtain a paper base of appropriate size as needed. Material; for example, the above-mentioned paper-based material is a square paper-based material with a length and width of 7 mm (i.e. 7 mm x 7 mm). Next, in step 32, the paper-based material is soaked in a solution containing methyl orange; for example, the solution is an aqueous solution containing 0.5-5.0 g/L methyl orange, and the soaking time is about 5-30 minute. Next, in step 34, the paper-based material soaked in the solution is dried to obtain the color-forming part 1042 (which can be used as the sample detection part 104); for example, the color-forming part 1042 is dried in an oven at 80±10 It is obtained by drying the paper base material at a temperature of ℃ for about 1-20 minutes. In some embodiments, the sample detection component 104 further includes a base portion 1044, and then step 36 can be optionally performed. In step 36, the coloring part 1042 is disposed on the base part 1044, and the sample detection piece 104 including the coloring part 1042 and the base part 1044 can be obtained. In some embodiments, the sample detection component 104 further includes a fixing portion 1046, and then step 38 can be optionally performed. In step 38, the fixing part 1046 is disposed between the coloring part 1042 and the base part 1044, or the fixing part 1046 is disposed on part of the coloring part 1042 and the base part 1044, so that the coloring part including the coloring part can be obtained. 1042. The sample detection piece 104 of the base part 1044 and the fixing part 1046; for example, the fixing part 1046 is through an adhesive disposed between the coloring part 1042 and the base part 1044, or the fixing part 1046 is disposed on a part. The colored part 1042 and the adhesive tape on the base part 1044. Therefore, through the above-mentioned preparation method 3 of the sample detection part 104 and its color developing part 1042, there is no need to use other expensive and non-portable semiconductor equipment to prepare, and the operation can be more convenient, faster and the preparation cost is relatively low. A more economical preparation method is used to prepare the coloring part 1042/sample detection part 104 that can be used to detect the ammonia concentration value. In addition, since the coloring part 1042 can be made of paper-based material, which has the characteristics of portability, disposability and storage convenience, and the paper-based material is easy to be decomposed by organisms, some embodiments of the present invention can also be used. While detecting the ammonia concentration value, it avoids excessive burden on the environment and adheres to the green chemistry principle.

Please refer to FIGS. 2 and 4 . FIG. 4 is a schematic diagram of a color comparison device 12 according to some embodiments. In FIG. 2 and FIG. 4 , the color comparison device 12 includes an image capture component 122 and a density determination component 126 . The image capture component 122 may be a component with a camera function, such as an optical camera component with a camera function (in some embodiments, it may even have a video recording function). The image capturing component 122 is disposed adjacent to the sample device 10 , and the image capturing component 122 captures the light from the closed space 1020 to form a color image of the coloring part 1042 . The density reading component 126 is communicatively connected to the image capturing component 122, and captures the color image from the image capturing component 122, and captures the hue value of the color image. The concentration reading component 126 then calculates the ammonia gas concentration value corresponding to the hue value based on the hue value of the colored image and the calibration curve of the hue value to the ammonia gas concentration value.

Please refer next to FIG. 7 , which illustrates a hue value comparison diagram of color images of methyl orange on ammonia and other gases according to some embodiments. In Figure 7, the sealed space 1020 of the sample holding tank 102 of the sample device 10 used is 3.0 cm, 3.0 cm and 1.5 cm in length, width and height respectively, and the coloring part 1042 is 7 mm in length and width. Paper-based material (the preparation method is to soak the paper-based material in an aqueous solution containing 2.5 g/L methyl orange for about 10 minutes, and dry it in an oven at a temperature of 80±1°C for about 5 minutes), and penetrate the sample The inlet 106 (syringe) injects each detection gas with a fixed volume of 0.3 mL (including the blank group and 10.0 ppm of each gas (including methanol, ethanol, ether, ethyl acetate, acetone, acetonitrile, chloroform, and methylene chloride). , n-hexane, toluene, formaldehyde, acetic acid, acetaldehyde, benzene, dimethylformamide and hydrogen sulfide), 78.0% nitrogen, 30.0% carbon dioxide, 20.0% oxygen, water and 12.0 ppbv ammonia) to the confined space 1020 , and wait for color development for about 3 minutes; each detection gas is tested three times and the average value is taken. The color image of the coloring part 1042 after passing each detection gas is obtained through the image capture part 122 (in this case, the lens of the iPhone 11 is used), and through the concentration reading part 126 (in this case, the CPU of the iPhone 11 and its The installed application ColorAssist ver. 2.1 (manufacturer: FTLapps)) obtains the hue value corresponding to each colored image, as shown in Figure 7. As can be seen from Figure 7, except for ammonia, the hue values of the other detection gases fall between 5.0-7.5 degrees, while the hue value of ammonia is about 22.5 degrees, which is significantly higher than other detection gases. In other words, the hue value captured by the concentration reading element 126 can indeed be used to detect and determine whether ammonia is contained in the environment.

Please refer next to FIG. 8 , which is a schematic diagram of the calibration curve of the hue value and the ammonia concentration value according to some embodiments. In Figure 8, the sealed space 1020 of the sample holding tank 102 of the sample device 10 used is 3.0 cm, 3.0 cm and 1.5 cm in length, width and height respectively, and the coloring part 1042 is 7 mm in length and width. Paper-based material (the preparation method is to soak the paper-based material in an aqueous solution containing 2.5 g/L methyl orange for about 10 minutes, and dry it in an oven at a temperature of 80±1°C for about 5 minutes), and penetrate the sample The inlet volume of the access piece 106 (syringe) is fixed at 20 mL and contains 78.0% nitrogen, 30.0% carbon dioxide, 20.0% oxygen, 0.30 mL of water and ammonia of different concentrations (including 0.0, 6.0, 12.0, 18.0 , 24.0, 30.0, 36.0, 42.0, 48.0 and 54.0 ppbv) of each detection gas into the closed space 1020, and wait for color development for about 3 minutes; each detection gas is repeated three times and the average value is taken. The color image of the coloring part 1042 after each detection gas is passed through is obtained through the image capture part 122 (in this case, the lens of the iPhone 11 is used), and through the concentration reading part 126 (in this case, the CPU of the iPhone 11 is used and its The installed application ColorAssist ver. 2.1 (manufacturer: FTLapps)) obtains the hue value corresponding to each color image and the corresponding ammonia concentration value, as shown in Figure 8. As can be seen from ^Figure 8, there can be a calibration curve ( y = 0.762 The obtained hue value is brought into, for example, the above-mentioned calibration curve, and the ammonia concentration value contained in the detection gas can be obtained. In other words, in addition to detecting whether the gas contains ammonia, the ammonia detection system 1 of some embodiments of the present invention can also be used to detect the ammonia concentration value in the gas, and even the detectable ammonia Concentration values can range as low as sub-ppmv levels of 6.0 ppbv-54.0 ppbv (i.e. 0.006 ppmv-0.054 ppmv).

In FIGS. 2 and 4 , according to some embodiments, the color comparison device 12 further includes an image display component 124 . The image display component 124 may be a component with a display function, such as various screens. In some embodiments, the image display component 124 is communicatively connected to the image capture component 122 and receives the rendered image from the image capture component 122 so as to display the rendered image through the image display component 124 . In some embodiments, the image display component 124 is communicatively connected to the concentration reading component 126, and receives at least one of the hue value and the ammonia concentration value from the concentration sensing component 126, so as to display the display hue value through the image display component 124. and/or ammonia concentration value (i.e. displaying hue value, ammonia concentration value, and hue value and ammonia concentration value). In some embodiments, the image display component 124 is simultaneously connected to the image capture component 122 and the concentration reading component 126 to display at least one of the color image, the hue value and the ammonia concentration value through the image display component 124 . Thereby, some embodiments of the present invention can obtain the real-time color image capture results and the actual ammonia concentration value after correction and conversion through the display of the image display unit 124. Therefore, in addition to improving the detection efficiency, It is also possible to avoid detection errors caused by deviations in the captured color images or environmental interference, and to obtain more accurate and reproducible detection results.

In some embodiments, the color rendering comparison device 12 further includes a data storage component (not shown). The data storage may be a component with storage capabilities, such as a memory card, computer built-in memory, or cloud (server) memory. The data storage communication is connected to at least one of the image capture component 122 and the density interpretation component 126 to receive the color image from the image capture component 122 and/or to receive the hue value and ammonia from the density interpretation component 126 At least one of the gas concentration values is used to store at least one of the color image, the hue value and the ammonia gas concentration value through the data storage. Therefore, some embodiments of the present invention can store or retrieve the detection data in the data storage device to facilitate subsequent retrieval of the detection data at any time and location.

In Figures 1 and 2, according to some embodiments, the sample holding tank 102 also includes one or more protrusions 1028. Each protrusion 1028 is protruding from the sample holding tank 102 and has a protrusion height; for example, In other words, each protrusion 1028 is protruding from the groove wall 1024 and away from the groove bottom 1022 . In FIGS. 1 and 2 , according to some embodiments, the color comparison device 12 is adapted to be disposed on the protrusion 1028 and disposed adjacent to the sample device 10 . The height of the convex portion 1028 can be adjusted according to different capture focal lengths of the image capture component 122 of the color comparison device 12 . In addition, after adjusting the height of the convex portion, the height of the convex portion can be fixed (that is, the capture focal length of the image capture component 122 is fixed), thereby reducing or avoiding possible errors when the color comparison device 12 captures a color image. resulting human error.

In addition, please refer to FIG. 5 , which illustrates a schematic flow chart of the ammonia gas detection method 2 according to some embodiments. In Figure 5, the ammonia detection method 2 includes the following steps: In step 20, the sample detection part (for example, the sample detection part 104 in Figure 1) is accommodated in the sample holding tank (for example, the sample holding tank in Figure 1). In the tank 102), the sample detection part (for example, the coloring part 1042 in Figure 1) contains methyl orange; the details can be referred to the above, so they will not be described in detail here. Next, in step 24, the gas is introduced into the sample holding tank (such as the sample holding tank 102 in Figure 1); for example, in Figure 1, the gas can be passed through the sample inlet 1026 provided on the sample holding tank 102 and The corresponding sample inlet 106 injects gas into the sample holding tank 102; its details can be referred to the above, so they will not be described in detail here. Next, in step 26, the sample detection part (such as the sample in FIG. 2) is captured through the color comparison device (such as the color comparison device 12 in FIG. 2, or the image capture part 122 in FIG. 4). The color image of the detection part 104), and in step 28, the hue value corresponding to the color image is captured through the color comparison device (such as the concentration judgment part 126 in Figure 4) to pass the color comparison device (For example, the concentration reading component 126 in Figure 4 ) The ammonia gas concentration value corresponding to the hue value is obtained according to the hue value; the details can be referred to the above, so they will not be described in detail here.

In Figure 5, according to some embodiments, before the step of introducing gas into the sample holding tank in step 24, the ammonia detection method 2 further includes the following steps: in step 22, seal the sample holding tank (for example, Figure 1 The sample holding tank 102 in FIG. 1 ); for example, in FIG. 1 , by disposing the cover 108 on the tank wall 1024 , a sealed space 1020 can be formed between the cover 108 , the tank wall 1024 and the tank bottom 1022 ; The details can be found in the foregoing, so they will not be described in detail here.

In some embodiments, the ammonia concentration value is calculated through a calibration curve of the hue value of the colored image versus the ammonia concentration value, and the obtained ammonia concentration value can be 6 ppbv-54 ppbv; the details It can be referred to the above, so it will not be described in detail here.

Based on the above, the present invention provides an ammonia detection system. In some embodiments, the ammonia detection system can separately or simultaneously have low reagent consumption, economical production and detection costs, high detection efficiency, strong portability, small size and can be used. Disposal and other features, and can also measure the ammonia concentration value in the gas as low as 0.006 ppmv-0.054 ppmv (that is, 6.0 ppbv-54.0 ppbv) sub-ppmv levels (sub-ppmv levels). Therefore, through the ammonia gas detection system and ammonia gas detection method provided by some embodiments of the present invention, the danger caused by the human body being exposed to ppmv level ammonia gas environment can be prevented; at the same time, it can also detect excessive amounts in the environment early Ammonia concentration value, and corresponding preventive measures can be taken in time to prevent ammonia from further forming fine suspended particles and causing its concentration to rise.

Although the present invention has been disclosed in the foregoing embodiments, they are not intended to limit the present invention. Anyone skilled in the similar art can make some modifications and modifications without departing from the spirit and scope of the present invention. Therefore, the present invention is The scope of patent protection shall be determined by the scope of the patent application attached to this specification.

1: Ammonia detection system 10:Sample device 102:Sample holding tank 1020:Confined space 1022:Trough bottom 1024: Groove wall part 1026:Sample access part 1028:convex part 104:Sample testing parts 1042: Color rendering department 1044:Basal part 1046: Fixed part 106:Sample access piece 108: Cover 12: Color comparison device 122:Image capture 124:Image display part 126:Concentration reading piece 2: Ammonia detection method 20, 22, 24, 26, 28: Steps 3: Preparation method of sample detection piece and its color developing part 30, 32, 34, 36, 38: Steps

Figure 1 illustrates a perspective view of an ammonia gas detection system according to some embodiments. Figure 2 illustrates a perspective view of an ammonia gas detection system according to some embodiments. Figure 3A illustrates a perspective view of a sample detection element according to some embodiments. Figure 3B illustrates a perspective view of a sample detection element according to some embodiments. Figure 4 is a schematic diagram of a color rendering comparison device according to some embodiments. Figure 5 illustrates a schematic flow diagram of an ammonia gas detection method according to some embodiments. FIG. 6 is a schematic flowchart of a method for preparing a sample detection piece and its coloring part according to some embodiments. Figure 7 is a graph illustrating a comparison of the hue values of methyl orange color images of ammonia and other gases according to some embodiments. Figure 8 is a schematic diagram of a calibration curve of hue values and ammonia concentration values according to some embodiments.

1: Ammonia detection system

10:Sample device

102:Sample holding tank

1020:Confined space

1022:Trough bottom

1024: Groove wall part

1026:Sample access part

1028:convex part

104:Sample testing parts

1042: Color rendering department

1044:Basal part

108: Cover

12: Color comparison device

124:Image display part

Claims (10)

An ammonia detection system, including: A sample device containing: a sample holding tank suitable for introducing a gas; and A sample detection piece is accommodated in the sample holding tank, wherein the sample detection piece includes a coloring part, and the coloring part contains a methyl orange; and A color comparison device is adjacent to the sample device and captures a color image of the color portion and a hue value of the color image, and obtains an ammonia concentration value corresponding to the hue value based on the hue value. The ammonia gas detection system as described in claim 1, wherein the ammonia gas concentration value is 6 ppbv-54 ppbv. The ammonia gas detection system as claimed in claim 1, wherein the sample detection component further includes a base portion, and the coloring portion is disposed on the base portion. The ammonia detection system as described in claim 1, wherein the color comparison device includes: an image capture piece to capture the rendered image of the rendered portion; and A concentration interpretation component captures the hue value of the colored image, and obtains the ammonia gas concentration value corresponding to the hue value based on the hue value. The ammonia gas detection system of claim 1, wherein the color comparison device includes an image display component that displays at least one of the color image and the ammonia concentration value. The ammonia detection system as claimed in claim 1, wherein the sample holding tank has a sample inlet portion, the sample inlet portion is suitable for connecting a sample inlet piece, so as to introduce the gas to the sample through the sample inlet piece. Sample holding tank. The ammonia detection system of claim 1, wherein the sample device further includes a cover, the cover and the sample containing tank form a closed space, and the sample detection piece is received in the closed space. An ammonia gas detection method, including: A sample detection piece is placed in a sample holding tank, wherein the sample detection piece contains monomethyl orange; Pass a gas into the sample holding tank; and A color image of the sample detection piece and a hue value of the color image are captured through a color comparison device, so as to obtain an ammonia gas concentration value corresponding to the hue value based on the hue value. The ammonia gas detection method as claimed in claim 8, further comprising: sealing the sample holding tank before introducing the gas into the sample holding tank. The ammonia gas detection method as described in claim 8, wherein the ammonia gas concentration value is calculated through a calibration curve of the hue value and the ammonia gas concentration value, and the ammonia gas concentration value is 6 ppbv-54 ppbv.

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