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Analysis of Ar and O2, N2, CO2 and N2O in atmospheric air through one-time sampling with gas phase chromatography

A technology of gas chromatography and CO2, which is applied to the analysis of materials, material separation, and measurement devices, can solve the problems of large data accuracy errors and prolong the sample measurement cycle, so as to reduce data accuracy errors, shorten the sample measurement cycle, and easily The effect of the operation

Inactive Publication Date: 2012-10-03
LANZHOU CENT FOR OIL & GAS RESOURCES INST OF GEOLOGY & GEOPHYSICS CAS
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, gas chromatography is used to analyze Ar+O in the atmosphere 2 , N 2 , CO 2 , N 2 The O component requires more than two injections to obtain 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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  • Analysis of Ar and O2, N2, CO2 and N2O in atmospheric air through one-time sampling with gas phase chromatography
  • Analysis of Ar and O2, N2, CO2 and N2O in atmospheric air through one-time sampling with gas phase chromatography
  • Analysis of Ar and O2, N2, CO2 and N2O in atmospheric air through one-time sampling with gas phase chromatography

Examples

Experimental program
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Effect test

Embodiment 1

[0028] Example 1 like figure 1 Shown, gas chromatography one injection analysis of Ar+O in the atmosphere 2 , N 2 , CO 2 , N 2 O, first pass the carrier gas with a purity greater than 99.999% through the purifier at an output pressure of 0.20 MPa, so that the purity of the purified carrier gas is greater than 99.9999% or greater than 99.99999%; then pass the purified carrier gas at a flow rate of 15ml / min, At a temperature of 25°C, pass through the chromatographic column in the gas chromatograph where the sample to be tested has been placed In , after adsorption and desorption at a temperature of 25°C, the Ar+O in the sample to be tested 2 , N 2 , CO 2 , N 2 O enters the electron capture detector (ECD) to detect CO at a temperature of 90 °C 2 , N 2 O, and the data detected by the electron capture detector (ECD) are input to the chromatographic workstation in the gas chromatograph; at the same time, the carrier gas and the Ar+O in the sample to be tested 2 , N...

Embodiment 2

[0032] Example 2 like figure 1Shown, gas chromatography one injection analysis of Ar+O in the atmosphere 2 , N 2 , CO 2 , N 2 O, first pass the carrier gas with a purity greater than 99.999% through the purifier at an output pressure of 0.60 MPa, so that the purity of the purified carrier gas is greater than 99.9999% or greater than 99.99999%; then pass the purified carrier gas at a flow rate of 75ml / min, At a temperature of 50°C, it is passed into the chromatographic column of the gas chromatograph where the sample to be tested has been placed In , after adsorption and desorption at a temperature of 250°C, the Ar+O in the sample to be tested 2 , N 2 , CO 2 , N 2 O enters the electron capture detector (ECD) to detect CO at a temperature of 350 °C 2 , N 2 O, and the data detected by the electron capture detector (ECD) are input to the chromatographic workstation in the gas chromatograph; at the same time, the carrier gas and the Ar+O in the sample to be tested ...

Embodiment 3

[0036] Example 3 like figure 1 Shown, gas chromatography one injection analysis of Ar+O in the atmosphere 2 , N 2 , CO 2 , N 2 O, first pass the carrier gas with a purity greater than 99.999% through the purifier at an output pressure of 0.40 MPa, so that the purity of the purified carrier gas is greater than 99.9999% or greater than 99.99999%; then pass the purified carrier gas at a flow rate of 45ml / min, At a temperature of 35°C, pass through the chromatographic column in the gas chromatograph where the sample to be tested has been placed In , after adsorption and desorption at a temperature of 100°C, the Ar+O in the sample to be tested 2 , N 2 , CO 2 , N 2 O enters an electron capture detector (ECD) to detect CO at a temperature of 220 °C 2 , N 2 O, and the data detected by the electron capture detector (ECD) are input to the chromatographic workstation in the gas chromatograph; at the same time, the carrier gas and the Ar+O in the sample to be tested 2 , ...

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Abstract

The invention relates to analysis of Ar and O2, N2, CO2 and N2O in atmospheric air through one-time sampling with gas phase chromatography. The method comprises the following steps of: making carrier gas of which the purity is over 99.999 percent flow through a purifier under the output pressure of 0.20-0.60MPa till the purity of the purified carrier gas is over 99.9999 percent or over 99.99999 percent; introducing the purified carrier gas into a chromatographic column in which a sample to be tested is placed in a gas chromatograph, performing adsorption and desorption, feeding into an electron capture detector for detecting, and inputting detected data into a chromatographic work station in the gas chromatograph by using the electron capture detector; and meanwhile, feeding carrier gas and Ar and O2, N2, CO2 and N2O in the sample to be detected into the chromatographic column in the gas chromatograph, performing adsorption and desorption, feeding into a thermal conductivity cell detector for detecting, and inputting detected data into the chromatographic work station in the gas chromatograph by using the thermal conductivity cell detector to obtain an analysis result chromatogram. According to the invention, easiness in operating is realized, the data accuracy error can be lowered effectively, and the sample measuring period is 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 Ar+O in the atmosphere by gas chromatography once sampled. 2 , N 2 , CO 2 , N 2 O. Background technique [0002] At present, gas chromatography is used to analyze Ar+O in the atmosphere 2 , N 2 , CO 2 , N 2 The O component requires more than two injections to obtain the final result. This method not only causes a large error in data accuracy, 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 Ar+O in the atmosphere at one time. 2 , N 2 , CO 2 , N 2 O. [0004] In order to solve the above problems, the gas chromatography of the present invention ana...

Claims

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Application Information

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