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Two-column system gas chromatograph

A technology of gas chromatograph and double-column system, which is applied in the direction of instruments, scientific instruments, measuring devices, etc., and can solve the problems of chromatographic column separation, special gas is not very good, imperfect, etc.

Active Publication Date: 2015-05-06
SHANGHAI HUAAI CHROMATOGRAPHIC ANALYSIS
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  • Abstract
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  • Application Information

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Problems solved by technology

At present, the analysis methods of many gases are not perfect at home and abroad, and many special gases do not have good chromatographic columns for separation

Method used

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  • Two-column system gas chromatograph
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  • Two-column system gas chromatograph

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Experimental program
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Embodiment

[0018] The first chromatographic column among the present invention adopts Porapak Q chromatographic column, and the second chromatographic column adopts 5A molecular sieve chromatographic column, and a bottle of high-purity helium gas standard sample is analyzed, and impurity is H 2 , O 2 , N 2 , CH 4 , CO, impurity concentration at 5ppm.

[0019] The specific sample injection and working process are as follows:

[0020] A: as attached figure 1 As shown, the sample inlet 8 is connected to the standard sample, and the first switching valve 1 starts to inject the sample. Simultaneously switch the second switching valve 2, as attached image 3 As shown, the second carrier gas 5 carries the sample in the second quantitative tube 7 into the 5A molecular sieve chromatographic column, and then enters the PDD helium ionization detector to realize the analysis on the second chromatographic column.

[0021] B: as attached figure 1 As shown, the sample inlet 8 is connected to the...

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Abstract

The invention relates to a two-column system gas chromatograph. The two-column system gas chromatograph is characterized in that a first changeover valve of the gas chromatograph is provided with a first quantifying pipe and a second quantifying pipe; a second changeover valve is provided with a first chromatographic column and a second chromatographic column; a third changeover valve is provided with a first needle valve, a second needle valve and a PDD helium ionization detector. By adopting the two chromatographic columns, the characteristic research and contrast test of the chromatographic columns can be better realized by virtue of independent analysis and collective analysis of the two chromatographic columns.

Description

technical field [0001] The invention relates to a gas chromatograph, and in particular discloses a double-column system gas chromatograph. Two chromatographic columns are used for the analysis of gas products, and the independent analysis and joint analysis of the two chromatographic columns can better realize the characteristics research and comparative experiments. Background technique [0002] With the rapid development of industry, the application of various gases is also more extensive. An increasing number of gases require analytical detection. The separation system is the core of gas chromatography, mainly composed of chromatographic columns. For different gas analysis, different chromatographic columns are required for separation. At present, the analysis methods of many gases are not perfect at home and abroad, and many special gases do not have good chromatographic columns for separation. It is imperative to seek corresponding chromatographic columns and analyt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/02
Inventor 庄鸿涛郁光方华
Owner SHANGHAI HUAAI CHROMATOGRAPHIC ANALYSIS