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Method for analyzing N2O, CO, CH4 and CO2 in atmosphere with one injection by gas chromatography

A gas chromatography, CH4 technology, applied in the direction of analysis of materials, material separation, measurement devices, etc., can solve the problems of prolonging the sample measurement cycle and large data accuracy errors, shortening the sample measurement cycle, reducing the data accuracy error, data accuracy and so on. The effect of improved accuracy

Inactive Publication Date: 2012-06-13
LANZHOU CENT FOR OIL & GAS RESOURCES INST OF GEOLOGY & GEOPHYSICS CAS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] At present, gas chromatography is used to analyze N in the atmosphere 2 O, CO, CH 4 , CO 2 Components need more than two injections to get the final result. This method not only causes large errors in data accuracy, but also prolongs the sample measurement cycle.

Method used

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  • Method for analyzing N2O, CO, CH4 and CO2 in atmosphere with one injection by gas chromatography
  • Method for analyzing N2O, CO, CH4 and CO2 in atmosphere with one injection by gas chromatography
  • Method for analyzing N2O, CO, CH4 and CO2 in atmosphere with one injection by gas chromatography

Examples

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Embodiment 1

[0025] Example 1 Gas Chromatography One-shot Analysis of N in the Atmosphere 2 O, CO, CH 4 , CO 2 , first reduce the purity to less than 10 -5 % carrier gas - He passes through the purifier at an output pressure of 0.20Mpa, so that the purity of the purified carrier gas is less than 10 -6 %; then pass the purified carrier gas into the chromatographic column in the gas chromatograph where the sample to be tested has been placed at a flow rate of 25ml / min at a temperature of 10°C, and after adsorption and desorption at a temperature of 20°C , N in the sample to be tested 2 O, CO, CH 4 , CO 2 Enter the electron capture detector (ECD), methane reformer and hydrogen flame ionization detector (FID) in sequence, and detect at a temperature of 90 ° C; finally the electron capture detector (ECD) and hydrogen flame ionization detector (FID ) The obtained data are simultaneously input to the chromatographic workstation in the gas chromatograph, and the analysis result chromatogram ...

Embodiment 2

[0028] Example 2 Gas Chromatography One-shot Analysis of N in the Atmosphere 2 O, CO, CH 4 , CO 2 , first reduce the purity to less than 10 -5 % carrier gas—Ne passes through the purifier at an output pressure of 0.60Mpa, so that the purity of the purified carrier gas is less than 10 -7 %; then pass the purified carrier gas into the chromatographic column of the gas chromatograph where the sample to be tested has been placed at a temperature of 40°C at a flow rate of 195ml / min, and after adsorption and desorption at a temperature of 250°C , N in the sample to be tested 2 O, CO, CH 4 , CO 2 Enter the ECD, the methane converter and the FID in sequence, and perform detection at a temperature of 350°C; finally, the data obtained by the ECD and the FID are simultaneously input to the chromatographic workstation in the gas chromatograph, and the chromatogram of the analysis result can be obtained.

[0029] Among them: the chromatographic column refers to a stainless steel tube...

Embodiment 3

[0031] Example 3 Gas Chromatography One-shot Analysis of N in the Atmosphere 2 O, CO, CH 4 , CO 2 , first reduce the purity to less than 10 -5 % of carrier gas——Ar passes through the purifier at an output pressure of 0.40Mpa, so that the purity of the purified carrier gas is less than 10 -6 %; then pass the purified carrier gas into the chromatographic column of the gas chromatograph where the sample to be tested has been placed at a temperature of 15°C at a flow rate of 110ml / min, and after adsorption and desorption at a temperature of 150°C , N in the sample to be tested 2 O, CO, CH 4 , CO 2 Enter the ECD, methane converter and FID in sequence, and perform detection at a temperature of 220°C; finally, the data obtained by the ECD and FID are simultaneously input to the chromatographic workstation in the gas chromatograph, and the chromatogram of the analysis result can be obtained.

[0032] Among them: the chromatographic column refers to a stainless steel tube with an...

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Abstract

The present invention relates to a method for analyzing N2O, CO, CH4 and CO2 in atmosphere with one injection by gas chromatography. According to the method, a carrier gas with the purity less than 10-5% passes through a purifier under the output pressure of 0.20-0.60 Mpa, such that the purity of the purified carrier gas is less than 10-6% or 10-7%; the purified carrier gas is introduced into a chromatographic column loaded with a sample requiring detection in a gas chromatograph, after an adsorption effect and a desorption effect, N2O, CO, CH4 and CO2 in the sample requiring detection sequentially enter an electron capture detector, a methane converter and a hydrogen flame ionization detector perform detections at the temperature of 90-350 DEG C; finally the data from the electron capture detector and the hydrogen flame ionization detector are concurrently input to a chromatographic work station in the gas chromatograph to obtain the analysis result chromatogram. The method of the present invention is simple, and is easy to operate. With the method of the present invention, the data accuracy error can be effectively reduced, and the sample measurement period can be shortened.

Description

technical field [0001] The invention relates to the technical fields of coal mine safety, environmental protection, air separation preparation, etc., and in particular relates to the analysis of N in the atmosphere by gas chromatography once sampled. 2 O, CO, CH 4 , CO 2 . Background technique [0002] At present, gas chromatography is used to analyze N in the atmosphere 2 O, CO, CH 4 , CO 2 The components need to be injected more than two times to obtain the final result. This method not only causes large data accuracy errors, but also prolongs the sample measurement cycle. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a gas chromatography that effectively reduces data accuracy errors and shortens the sample measurement cycle to analyze N in the atmosphere at one time. 2 O, CO, CH 4 , CO 2 . [0004] In order to solve the problems referred to above, gas chromatography of the present invention once sam...

Claims

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Application Information

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IPC IPC(8): G01N30/16G01N30/88
Inventor 潘旭
Owner LANZHOU CENT FOR OIL & GAS RESOURCES INST OF GEOLOGY & GEOPHYSICS CAS
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