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Gas phase chromatography carrier gas switching use method

A gas chromatography and carrier gas technology, applied in the field of gas chromatography carrier gas switching, can solve the problems of low switching efficiency, inflexibility, inconvenient carrier gas switching, etc., and achieve the effects of cost saving, large expansion range and high efficiency

Inactive Publication Date: 2019-03-26
贵州黔希化工有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The invention is inconvenient to switch the carrier gas, the switching efficiency is low, and it is not flexible enough

Method used

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  • Gas phase chromatography carrier gas switching use method
  • Gas phase chromatography carrier gas switching use method
  • Gas phase chromatography carrier gas switching use method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] see Figure 1-3 , a gas chromatographic carrier gas switching method, characterized in that the gas path transformation is carried out, and the carrier gas switching technology is used to realize the analysis of different gases in a single gas path, and the switching of the carrier gas is realized by switching the valve. 2 When gas is the carrier gas, H 2 detection, when H 2 When the gas is the carrier gas, O 2 (AR), N 2 、CH 4 , CO detection.

[0022] The detector used is a TCD detector, the chromatographic column used is a 13-X chromatographic column, the temperature of the column oven is 62°C, the detector temperature is 155°C, and the detector current is 84mA.

Embodiment 2

[0024] see Figure 1-3 , a gas chromatographic carrier gas switching method, characterized in that the gas path transformation is carried out, and the carrier gas switching technology is used to realize the analysis of different gases in a single gas path, and the switching of the carrier gas is realized by switching the valve. 2 When gas is the carrier gas, H 2 detection, when H 2 When the gas is the carrier gas, O 2 (AR), N 2 、CH 4 , CO detection.

[0025] The detector used is a TCD detector, the chromatographic column used is a 13-X chromatographic column, the temperature of the column oven is 60°C, the detector temperature is 165°C, and the detector current is 85mA.

Embodiment 3

[0027] see Figure 1-3 , a gas chromatographic carrier gas switching method, characterized in that the gas path transformation is carried out, and the carrier gas switching technology is used to realize the analysis of different gases in a single gas path, and the switching of the carrier gas is realized by switching the valve. 2 When gas is the carrier gas, H 2 detection, when H 2 When the gas is the carrier gas, O 2 (AR), N 2 、CH 4 , CO detection.

[0028] The detector used is a TCD detector, the chromatographic column used is a 13-X chromatographic column, the temperature of the column oven is 60°C, the detector temperature is 155°C, and the detector current is 82mA.

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Abstract

The invention relates to the technical field of gas phase detection, in particular to a gas phase chromatography carrier gas switching use method. An air path transformation is performed; a carrier gas switching technology is used for realizing single-gas-path analysis of different gas; through the switching on a valve, the switching on the carrier gas can be realized; when the N2 gas is used as the carrier gas, the H2 detection can be realized; when the H2 gas is used as the carrier gas, the detection on O2(AR), N2, CH4 and CO can be realized. Compared with gas source switching, the switchingefficiency on a chromatography gas inlet is high; the transformation is easy; the flexibility is high; the TCD detector is a detector with the widest use; the switching technology has the wider expansion range; the carrier gas is switched into N2 and H2 switching; no damage is caused on heat wires, so that an analysis method of directly using a valve 1 and a valve 2 for switching without switching off current of the detector and calling out different carrier gas setting parameters after the switching is used. The method has the advantages that simplicity and high speed are realized; the use is convenient; the cost is reduced.

Description

technical field [0001] The invention relates to the technical field of gas phase detection, in particular to a method for switching and using gas chromatography carrier gas. Background technique [0002] Gas chromatography is widely used in the chemical industry, and a single chromatograph with a single flow path adopts a single carrier gas control mode as a conventional configuration. The function of the carrier gas is to carry the gas sample or the vaporized sample gas into the chromatographic column at a certain flow rate for separation, and then load the separated components into the detector for detection. N2, H2, and AR are three commonly used carrier gases, and their gas chromatography analysis is widely used in various industries but as an analysis. [0003] According to market research, the average market price of a single unit with dual gas circuits, dual TCD checkers, dual six-way switching valves, and two 13-X chromatographic columns is between RMB 300,000 and R...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/28
CPCG01N30/28
Inventor 孙玉佶杨善亮
Owner 贵州黔希化工有限责任公司
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