Mass spectrum and chromatography interface device and mounting method thereof

Abstract

The invention provides a mass spectrum and chromatography interface device and a mounting method thereof. The mass spectrum and chromatography interface device comprises a chromatographic column, the end cover is provided with a first axial extension part, a radial part, a second axial extension part and a third axial extension part which are arranged in sequence; a hollow inner diameter expansion section is arranged in the first axial extension part, and a through hole is formed in the radial part; the second axial extension part is connected with the circumferential direction of the radial part, and the outer diameter of the second axial extension part is smaller than that of the third axial extension part; the pressed part is arranged in the inner diameter expansion section and is extruded by the extrusion part; a protective tube is arranged on one side of the radial part; the chromatographic column sequentially penetrates through the protective tube, the through hole of the radial part, the through hole of the pressed part and the through hole of the extrusion part; and a sleeve is arranged on the outer side of the protection pipe, one end of the sleeve is connected with the third axial extending part, and the other end of the sleeve is provided with a mounting position. The sealing piece is arranged on the outer side of the second axial extrusion part in a sleeving mode. The device has the advantages of good sealing, small error and the like.

Description

technical field [0001] The invention relates to mass spectrometry and chromatography, in particular to an interface device and method for mass spectrometry and chromatography. Background technique [0002] The GC / MSD interface is used to introduce the sample gas separated by the chromatographic column into the mass analyzer for analysis. When the mass detector detects the sample, it often needs a good vacuum environment, and the GC / MSD interface is easy to introduce leaks during the process of introducing the sample gas into the vacuum chamber. In addition, the chromatographic column is easy to be cold during the transmission process, resulting in the adsorption of a small amount of sample gas, which leads to the broadening of the peak width of the sample gas, so the heat tracing of the GC / MSD interface is very important. [0003] The solution of the existing instrument is to fix the GC / MSD interface to one side of the analyzer box through bolts, and seal it with an O-ring ...

AI Technical Summary

Problems solved by technology

[0005] 2. The sealing position between the liner and the chromatographic column is located on the far right side away from the vacuum chamber, which means that the chromatographic column channel in the middle of the liner will be evacuated, so when heating the chromatographic column, it mainly depends on the chromatographic column and The slender curve formed by the liner channel contact conducts heat, which is prone to uneven heat transfer

Fragments of the column can easily fall into the vacuum chamber during this process and may damage the turbomolecular pump

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