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Continuous sample introduction system of gas chromatograph

A gas chromatograph and sampling system technology, applied in the field of automatic control, can solve the problems of low efficiency, manpower consumption, errors, etc., and achieve the effects of reducing errors, improving analysis and detection efficiency, and saving manpower

Inactive Publication Date: 2018-03-13
NANJING LVZHICHENG PATENT TECH DEV CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The function of the sampling system of gas chromatography is to introduce the sample directly or after special treatment into the gasification chamber or chromatographic column of the gas chromatograph for analysis; it mainly includes two types at present: 1. Manual sampling system micro-syringe: use a micro-syringe to extract A certain amount of gas or liquid sample is injected into the gas chromatograph for analysis; however, this kind of sampling method requires manual operation, which not only consumes manpower, but also causes errors; 2. The liquid autosampler can realize automatic operation, Reduce artificial sampling errors and reduce manual operation costs, but cannot continuously inject multiple samples, and the efficiency is not high

Method used

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  • Continuous sample introduction system of gas chromatograph

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Experimental program
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Effect test

Embodiment 1

[0016] see figure 1 , a continuous sampling system for a gas chromatograph, comprising a sampling unit 1, a sampling unit 2 and a vaporization chamber 3 for a gas chromatograph;

[0017] Said sampling part 1 is horizontally arranged outside the vaporization chamber 3 of the gas chromatograph, and a plurality of sample storage tanks 4 to be tested are arranged; said sampling part 2 comprises a sampling tube 5 and a water pump 6 arranged on the sampling tube 5 pipeline, said One end of the sampling tube 5 is located directly above the sampling part 1 , and the other end is connected to the vaporization chamber 3 of the gas chromatograph.

Embodiment 2

[0019] see figure 1 , as an improvement of the present invention, in order to further change the relative position of the storage tank 4 for the sample to be tested and the sampling tube 5 , a conveyor belt 7 is provided at the bottom of the sampling part 1 .

[0020] In order to prevent dust, a dust-proof electromagnetic valve is set on the top of the sample injection part

[0021] The rest of the structures and advantages are exactly the same as in Embodiment 1.

Embodiment 3

[0023] see figure 1 , as an improvement of the present invention, the continuous sampling system of the gas chromatograph also includes an automatic control system; the automatic control system includes a signal acquisition unit, a signal analysis unit, and a control execution unit; the signal acquisition unit collects gas phase The signal on the chromatograph detector, the signal analysis part analyzes whether the sample under test has been detected, and then sends out an execution command according to the analysis result, and the control execution part controls the movement and stop of the transmission belt and the opening and closing of the water pump 6 according to the execution command.

[0024] The rest of the structures and advantages are exactly the same as in Embodiment 1.

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Abstract

The invention belongs to the field of automatic control and particularly relates to a continuous sample introduction system of a gas chromatograph. The continuous sample introduction system comprisesa sample introduction part, a sample taking part and a gas chromatograph vaporizing chamber and is characterized in that the sample introduction part is horizontally arranged outside the gas chromatograph vaporizing chamber and provided with a plurality of storage grooves for to-be-detected samples; the sample taking part comprises a sample taking tube and a water pump arranged on the sample taking tube, one end of the sample taking tube is located right above the sample introduction part, and the other end of the sample taking tube is connected with the gas chromatograph vaporizing chamber; multiple samples stored by the sample introduction part are taken out through the sample taking part and automatically enter the gas chromatograph vaporizing chamber, and continuous sample introductionand discharge can be achieved after detection. The continuous sample introduction system has the advantages that by an automatic control system, complete automatic control can be achieved, continuousautomatic sample introduction of the gas chromatograph is achieved, manpower can be saved, analysis and detection efficiency can be increased, and errors can be reduced.

Description

technical field [0001] The invention belongs to the field of automatic control, in particular to a continuous sampling system for a gas chromatograph. Background technique [0002] The function of the sampling system of gas chromatography is to introduce the sample directly or after special treatment into the gasification chamber or chromatographic column of the gas chromatograph for analysis; it mainly includes two types at present: 1. Manual sampling system micro-syringe: use a micro-syringe to extract A certain amount of gas or liquid sample is injected into the gas chromatograph for analysis; however, this kind of sampling method requires manual operation, which not only consumes manpower, but also causes errors; 2. The liquid autosampler can realize automatic operation, Reduce artificial sampling errors and reduce manual operation costs, but cannot continuously inject multiple samples, and the efficiency is not high. Contents of the invention [0003] The invention s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/24
CPCG01N30/24
Inventor 向巧云
Owner NANJING LVZHICHENG PATENT TECH DEV CO LTD