Method for analyzing nitrous oxide and carbon dioxide in atmosphere by adopting gas chromatography through one sampling

A gas chromatography and nitrous oxide technology, which is applied in the field of carbon dioxide and gas chromatography to analyze nitrous oxide in the atmosphere with one sample injection, can solve the problems of prolonging the sample measurement period and large data accuracy error, and shortening the sample measurement period. , The effect of reducing data accuracy error and easy operation

Inactive Publication Date: 2011-02-09
LANZHOU CENT FOR OIL & GAS RESOURCES INST OF GEOLOGY & GEOPHYSICS CAS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, gas chromatography is used to analyze N in the atmosphere 2 O.CO 2 The components need to be sampled twice to get the final result. This method not only causes a large error in data accuracy, but also prolongs the sample measurement cycle.

Method used

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  • Method for analyzing nitrous oxide and carbon dioxide in atmosphere by adopting gas chromatography through one sampling
  • Method for analyzing nitrous oxide and carbon dioxide in atmosphere by adopting gas chromatography through one sampling
  • Method for analyzing nitrous oxide and carbon dioxide in atmosphere by adopting gas chromatography through one sampling

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Example 1 Gas chromatographic analysis of nitrous oxide and carbon dioxide in the atmosphere with one sample injection: first, the purity is less than 10 -3 % Of carrier gas-He passes through the purifier at an output pressure of 0.20Mpa to make the purified carrier gas purity less than 10 -4 %; then the purified carrier gas is passed into the gas chromatograph at a flow rate of 15ml / min at a temperature of 15°C into the chromatographic column where the sample to be tested has been placed in the gas chromatograph, after adsorption and desorption at a temperature of 25°C , The nitrous oxide and carbon dioxide in the sample to be tested enter the ECD and TCD in turn, and the detection is carried out at a temperature of 90 ℃; finally the data obtained by ECD and TCD are simultaneously input to the chromatographic workstation in the gas chromatograph to obtain the analysis result Chromatogram.

[0022] Among them: Chromatographic column refers to a stainless steel tube with an ...

Embodiment 2

[0023] Example 2 Gas chromatographic analysis of nitrous oxide and carbon dioxide in the atmosphere with one sample injection: first, the purity is less than 10 -3 % Of carrier gas-Ne passes through the purifier at an output pressure of 0.60Mpa to make the purified carrier gas purity less than 10 -4 %; then pass the purified carrier gas into the gas chromatograph at a flow rate of 75ml / min at a temperature of 20°C into the chromatographic column where the sample to be tested has been placed, and after adsorption and desorption at a temperature of 30°C , The nitrous oxide and carbon dioxide in the sample to be tested enter the ECD and TCD in turn, and the detection is carried out at a temperature of 350℃; finally the data obtained by ECD and TCD are simultaneously input to the chromatographic workstation in the gas chromatograph, and the analysis result can be obtained Chromatogram.

[0024] Among them: Chromatographic column refers to a stainless steel tube with an inner diameter ...

Embodiment 3

[0025] Example 3 Gas chromatographic analysis of nitrous oxide and carbon dioxide in the atmosphere with one sample injection: first, the purity is less than 10 -3 % Of carrier gas-Ar passes through the purifier at an output pressure of 0.40Mpa to make the purified carrier gas purity less than 10 -4 %; then the purified carrier gas is passed into the gas chromatograph at a flow rate of 45ml / min at a temperature of 25°C into the chromatographic column where the sample to be tested has been placed in the gas chromatograph, and after adsorption and desorption at a temperature of 35°C , Nitrous oxide and carbon dioxide in the sample to be tested enter the ECD and TCD in turn, and the detection is carried out at a temperature of 220 ℃; finally the data obtained by ECD and TCD are simultaneously input to the chromatographic workstation in the gas chromatograph, and the analysis result can be obtained Chromatogram.

[0026] Among them: Chromatographic column refers to a stainless steel t...

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Abstract

The invention relates to a method for analyzing nitrous oxide and carbon dioxide in atmosphere by adopting gas chromatography through one sampling, which is characterized by firstly purifying the carrier gas with purity being less than 10-3% in a purifier under the output pressure of 0.20-0.60MPa to ensure the purity of the purified carrier gas to be less than 10-4%; secondly pumping the purifiedcarrier gas into a chromatographic column with samples to be detected in a gas chromatograph under the conditions of flow of 15-75ml / min and temperature of 15-40 DEG C and the nitrous oxide and carbon dioxide in the samples to be detected entering into an electron capture detector and a thermal conductivity cell detector in sequence after adsorption and desorption at 25-50 DEG C to be detected at90-350 DEG C; and finally simultaneously inputting the data obtained by the electron capture detector and the thermal conductivity cell detector into a chromatographic working station in the gas chromatograph, thus obtaining the analysis result chromatogram. The method is simple and easy to operate and can effectively reduce the data accuracy error and shorten the sample measuring period.

Description

Technical field [0001] The invention relates to the analysis of nitrous oxide and carbon dioxide in the fields of coal mines, environmental protection, air separation preparation and the like, in particular to the analysis of nitrous oxide and carbon dioxide in the atmosphere by gas chromatography with one sample injection. Background technique [0002] At present, gas chromatography is used to analyze N in the atmosphere 2 O, CO 2 The components need to be injected twice to get the final result. This method not only causes large data accuracy errors, but also extends the sample measurement cycle. Summary of the invention [0003] The technical problem to be solved by the present invention is to provide a gas chromatography method that can effectively reduce the data accuracy error and shorten the sample measurement period to analyze the nitrous oxide and carbon dioxide in the atmosphere at one time. [0004] In order to solve the above-mentioned problems, the gas chromatography met...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/62G01N30/14G01N30/60G01N30/02
Inventor 潘旭
Owner LANZHOU CENT FOR OIL & GAS RESOURCES INST OF GEOLOGY & GEOPHYSICS CAS
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