Pressure-flow electronic control system applied to chromatographic instrument sample inlet

Abstract

The invention discloses a pressure-flow electronic control system applied to a chromatographic instrument sample inlet. The pressure-flow electronic control system comprises an air inlet channel, a sample inlet, a blowing channel, a splitting channel and a chromatographic column channel, wherein the air inlet channel, the sample inlet and the blowing channel form a T-shaped channel structure; thesample inlet comprises a vaporizing chamber, a splitting channel body connected with the splitting channel and a partition pad arranged at the top of the vaporizing chamber; the vaporizing chamber isdirectly communicated with the chromatographic column channel, and the chromatographic column channel is provided with a chromatographic column; the air inlet channel is provided with an electronic air inlet control device, the blowing channel is provided with an electronic blowing control device, and the splitting channel is provided with an electronic splitting control device. According to the pressure-flow electronic control system disclosed by the invention, an electronic mode is respectively utilized to control corresponding proportions to control components under splitting and splitlesssampling modes; thus, pressure and flow in the sample inlet can quickly reach balance, and stability of a gas chromatograph sample inlet system is improved; furthermore, multiple shortcomings of manual adjustment are avoided.

Description

technical field [0001] The invention belongs to the field of chromatographs, in particular to a control device for a sample inlet of a chromatograph. Background technique [0002] A mass spectrometer is mainly composed of a sampling system, an ion source, ion introduction and ion transmission, a mass analyzer, and a detector. The purity of the sample in the sampling system directly determines the precision and accuracy of the detection. The sampling parts or devices in the system adopt a manual mechanical adjustment method, that is, when changing the gas pressure and flow rate in the sampling port, it is necessary to manually rotate the regulating valve. There will be pressure and flow drift, and problems such as program boosting cannot be realized, resulting in poor repeatability and low stability of the instrument. Therefore, it is necessary to find a technology or method that can accurately control the injection state. Contents of the invention [0003] In view of this...

AI Technical Summary

Problems solved by technology

[0002] A mass spectrometer is mainly composed of a sampling system, an ion source, ion introduction and ion transmission, a mass analyzer, and a detector. The purity of the sample in the sampling system directly determines the precision and accuracy of the detection. The sampling parts or devices in the system adopt a manual mechanical adjustment method, that is, when changing the gas pressure and flow rate in the sampling port, it is necessary to manually rotate the regulating valve. There will be pressure and flow drift, and problems such as program boosting cannot be realized, resulting in poor repeatability and low stability of the instrument. Therefore, it is necessary to find a technology or method that can accurately control the injection state

Images