Chromatographic column sampling system

Abstract

The invention provides a chromatographic column sampling system, comprising a sample injector, a chromatographic column tube and a connection unit. The connection unit comprises a first connection piece and a second connection piece; the first connection piece is arranged on the outlet end of the sample injector; the second connection piece is arranged on a sampling end of the chromatographic column tube; the first connection piece and the second connection piece are connected in a snap joint manner; and the chromatographic column tube communicates with the sample injector by the first connection piece and the second connection piece. In the prior art, when the chromatographic column tube and the sample injector are connected, the column head end of the chromatographic column tube is sleeved with a liner tube and then is sleeved with a nut, and when the chromatographic column tube and the sample injector are disassembled or connected, the chromatographic column tube is easy to bend, sothat a sample gas to be analyzed cannot enter the chromatographic column tube. The chromatographic column sample feeding system avoids disassembly inconvenience due to bend during disassembly by means of the first connection piece and the second connection piece.

Description

Technical field [0001] The invention relates to the field of manufacturing analysis equipment, and in particular to a chromatographic column sampling system. Background technique [0002] The chromatographic column is the core element of a gas chromatograph, and there are substances with separation effect inside. The current chromatographic column only fills a section of glass wool in the column head, and uses the expansion effect of the glass wool to contact the inner wall of the chromatographic column and generate friction, thereby fixing the glass wool to block the chromatographic packing. However, such a setting can easily cause the splashing of the packing material to contaminate the chromatograph components during use and damage the chromatographic column, especially those who are not skilled in the operation can easily forget to remove the carrier gas pressure and directly pull it out from the injector during use. Chromatographic column, at this time, the pressure in the ...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the above-mentioned technical deficiencies, and propose a chromatographic column sampling system to solve the problem in the prior art that the chromatographic column tube often causes fillers to spray out and cause laboratory accidents when the carrier gas pressure is removed. The problem that it is easy to be bent when it is disassembled or connected with the injector

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