Application of silica-gel chromatographic column to detection of high-purity gas via gas chromatography

A high-purity gas and gas chromatography technology, which is applied in the application field of high-purity gas gas chromatography detection of silica gel material chromatographic column analysis, can solve problems such as poor accuracy and sensitivity, and achieve the effect of eliminating interference and improving accuracy.

Active Publication Date: 2014-07-16
常州磐诺仪器有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention proposes the application of a silica gel material chromatographic column for analyzing high-purity gas gas chromatographic column, and the detection method and device of silica gel material chromatographic column gas chromatographic column, which solves the problem of the accuracy and sensitivity of high-purity gas detection in the prior art bad question

Method used

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  • Application of silica-gel chromatographic column to detection of high-purity gas via gas chromatography
  • Application of silica-gel chromatographic column to detection of high-purity gas via gas chromatography
  • Application of silica-gel chromatographic column to detection of high-purity gas via gas chromatography

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Embodiment 1 A kind of silica gel material chromatographic column

[0028] A silica gel material chromatographic column, the silica gel material is as follows: particle size 5 μm; pore size 100A; pore area 1.1ml / g; end-capping; specific surface area 450m 2 / g; metal impurities: <10ppm; carbon content 17%; pH range 1.5-10; temperature range 20-250°C. The purity of high-purity gas is equal to or higher than 99.999%, and the rotation of the silica gel material is relatively harsh during detection. The particle size, pore size, pore area and surface area of ​​the silica gel matrix will affect the adsorption of gas components; the above-mentioned silica gel chromatography production field The technology is often used in the process, and small molecule silylating agents such as trimethylchloro(methyl)silane or hexamethyldisilamine are used for passivation when sealing. When producing specific silica gel materials, existing production techniques are used, including acidificat...

Embodiment 2

[0029] Example 2 Silica gel chromatographic column analysis high-purity gas device

[0030] Such as figure 1 As shown, the silica gel chromatographic column analyzes high-purity gas equipment, including six-way valve 1, quantitative loop 4, chromatographic column 3 and detector 2; chromatographic column 3 includes molecular sieve chromatographic column and silica gel chromatographic column, six-way valve 1 and quantitative loop 4 Connection; the six-way valve 1 is connected with the molecular sieve chromatographic column, and the silica gel chromatographic column is connected with the detector 2; the silica gel chromatographic column is connected in series with the molecular sieve chromatographic column. The series connection of the molecular sieve chromatography column and the silica gel chromatography column adopts the conventional selection method of those skilled in the art.

[0031] Specifically preferably, the six-way valve 1 includes a quantitative loop inlet connectio...

Embodiment 3

[0033] Embodiment 3 Silica gel material chromatographic column is used for the analytical method of high-purity gas chromatography

[0034]Utilize the silica gel material chromatographic column in embodiment 1 and the silica gel chromatographic column described in embodiment 2 to analyze the device of high-purity gas: silica gel chromatographic column and 5A chromatographic column are connected in series, and wherein detection parameter is as follows:

[0035]

[0036]

[0037] The steps are as follows: wash the quantitative loop with air, and use air injection to saturate the 5A chromatographic column and the silica gel material chromatographic column; and after injecting saturation 10 times, detect the gas to be detected, and analyze the peak area of ​​each component.

[0038] The test results are shown in Table 1 and figure 2 and image 3 as shown,

[0039] Table 1: Average peak area and relative average deviation of each component of standard gas in helium

[004...

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Abstract

The invention provides an application of a silica-gel chromatographic column to detection of high-purity gas via gas chromatography, and relates to a method and a device for detecting high-purity gas by using the silica-gel chromatographic column. The application of the silica-gel chromatographic column to detection of the high-purity gas has the characteristics that the perfect chromatographic peak shape is provided, high sensitivity and good selectivity are obtained, the sharp peak is realized, the peak capacity is high and the like.

Description

technical field [0001] The invention relates to the field of gas chromatographic detection, in particular to the application of silica gel material chromatographic column to analyze high-purity gas gas chromatographic detection. Background technique [0002] Purified Gases, an industrial term, usually refers to gases with a certain level of purity that can be achieved using modern purification technologies. For different types of gases, the purity indicators are different. For example, for nitrogen, hydrogen, argon, and helium, it usually refers to a high-purity gas with a purity equal to or higher than 99.999%; for oxygen, a purity of 99.99% can be called high-purity Oxygen; for hydrocarbons, those with a purity of 99.99% can be considered high-purity gases; high-purity gases have a wide range of applications, and in the semiconductor industry, high-purity nitrogen, hydrogen, argon, and helium can be used as carrier and protective gases; high Pure gas can be used as the bo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/02
Inventor 杨任顾晖
Owner 常州磐诺仪器有限公司
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