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Detection method for simultaneously analyzing multiple organic gases

A detection method and technology for organic gases, which can be applied to analysis materials, measuring devices, material separation, etc., can solve the problems of inability to achieve high-throughput analysis of organic matter, complicated occupational disease hazard factors, and lack of analysis results, so as to save detection time and reduce Sample loss, simple and efficient operation

Pending Publication Date: 2020-12-22
ZHEJIANG CENT FOR DISEASE CONTROL & PREVENTION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Occupational hazard factors in the workplace are complex and there are many types of organic pollutants. It is difficult to quickly and accurately analyze the occupational hazard factors in various workplaces
The traditional analysis method is to use solid adsorption tubes such as activated carbon tubes and silica gel tubes to collect and absorb organic pollutants in the air, and then after the adsorption tubes are dissolved and desorbed or thermally desorbed, they are desorbed in the laboratory by a gas chromatograph or a gas spectrometer. Qualitative and quantitative analysis is carried out, but due to the existence of intermediate links such as sample transportation and storage, this method has a long detection period and lack of timeliness in analysis results, resulting in many uncertain factors affecting the detection accuracy, and it consumes a lot of manpower and material resources
[0003] Portable GC-MS technology is an excellent analytical technology, which can be directly injected and widely used in the analysis of volatile and semi-volatile organic compounds. However, the current portable GC-MS technology is limited to one or a few organic compounds. Determination, unable to achieve high-throughput analysis of organic matter

Method used

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  • Detection method for simultaneously analyzing multiple organic gases
  • Detection method for simultaneously analyzing multiple organic gases
  • Detection method for simultaneously analyzing multiple organic gases

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] 1. Instrument conditions:

[0046] Instrument Model: Mars-400Plus Portable GC-MS (Concentrating Technology Co., Ltd.)

[0047] Sampling conditions: the flow rate of the sampling pump is 100mL / min, the sampling time is 0.2min, the temperature of the sampling tube is 50°C, and the packing of the sampling tube is Tenax GR;

[0048] Chromatographic conditions: the chromatographic column is LTM DB-5MS (5m×0.1mm×0.4μm) flash chromatography column; the temperature of the injection port is 130°C, the temperature of the transfer line is 150°C, the temperature of the desorption is 300°C, and the temperature of the valve box is 50°C; Heating program: keep at 50°C for 1.00min, rise to 80°C at 10°C / min, then rise to 230°C at 15°C / min, and hold for 1.00min; injection mode: split injection, split ratio 100:1; loading Gas: helium, the flow rate is 0.2mL / min.

[0049] Mass spectrometry conditions: the interface temperature between the gas chromatograph and the mass spectrometer is 150...

Embodiment 2

[0061] Paint contains a variety of organic solvents, which will evaporate during operation. In this embodiment, the air in the painting post site is detected, and the steps are as follows:

[0062] The portable gas spectrometry instrument is placed on the site of the spraying post, and the air at multiple detection points on the site is collected and detected. With the same instrument conditions as in Example 1, the collected samples are passed through the gas chromatography of the portable mass spectrometer respectively. And mass spectrometry, detect, carry out qualitative analysis with the retention time of each component in the sample and characteristic ion, determine the component that exists in the sample, utilize the standard curve equation in the embodiment 1, use the peak of the quantitative ion of each component in the sample Quantitative analysis was carried out on the area to obtain the concentration of each component in the sample. The detection results of differen...

Embodiment 3

[0066] Detect the warehouse where glue and a small amount of organic solvents are stored in a shoe factory. In this embodiment, the air in the warehouse site is detected, and the steps are as follows:

[0067] The portable mass spectrometry instrument is placed on the warehouse site, and the air at two different detection points on the spot is detected. With the same instrument conditions as in Example 1, the collected samples are passed through the gas chromatography and the gas chromatography of the portable mass spectrometry instrument respectively. Mass spectrometry, detect, carry out qualitative analysis with the retention time of each component in the sample and characteristic ion, determine the component that exists in the sample, utilize the standard curve equation in the embodiment 1, use the peak area of ​​the quantitative ion of each component in the sample Quantitative analysis was carried out to obtain the concentration of each component in the sample, and the det...

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Abstract

The invention discloses a detection method for simultaneously analyzing multiple organic gases. The detection method comprises the following steps of (1) collecting a sample; (2) separating the sampleby gas chromatography; (3) detecting the separated sample by mass spectrometry; and (4) carrying out qualitative analysis according to the retention time and the characteristic ions of each componentin the sample, and carrying out quantitative analysis according to the peak area of the quantitative ions of each component in the sample by utilizing a standard curve equation. The detection methodcan be used for simultaneously and quickly analyzing various organic gases in a high-throughput manner, is convenient to operate, has higher accuracy and precision, and can greatly save detection steps and the detection time.

Description

technical field [0001] The application belongs to the field of air gas detection, and in particular relates to a detection method for simultaneously analyzing multiple organic gases. Background technique [0002] Occupational hazards in the workplace are complex and there are many types of organic pollutants. It is difficult to quickly and accurately analyze the occupational hazards in various workplaces. The traditional analysis method is to use solid adsorption tubes such as activated carbon tubes and silica gel tubes to collect and absorb organic pollutants in the air, and then after the adsorption tubes are dissolved and desorbed or thermally desorbed, they are desorbed in the laboratory by a gas chromatograph or a gas spectrometer. Qualitative and quantitative analysis is carried out, but due to the existence of intermediate links such as sample transportation and storage, this method has a long detection period and lack of timeliness in analysis results, resulting in m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/02G01N30/06G01N30/30G01N30/72G01N30/86
CPCG01N30/02G01N30/06G01N30/30G01N30/7206G01N30/8675G01N2030/047
Inventor 曹艺耀王鹏任鸿周振张美辨楼晓明徐秋凉张东霞胡勇
Owner ZHEJIANG CENT FOR DISEASE CONTROL & PREVENTION