Polymorphic sample injection device

Abstract

The invention provides a polymorphic sample injection device. The polymorphic sample injection device comprises a six-way anti-adsorption sample injection valve, a plurality of channel capillary tubes, a quantitative switching valve, a chromatograph and an experimental analyzer, wherein six interfaces of the six-way anti-adsorption sample injection valve are communicated with six air bag sample injection port pagoda joints; the channel capillary tube is communicated with the steel cylinder sample inlet quick connector; a first interface of the quantitative switching valve is communicated withthe six-way anti-adsorption sample injection valve and the plurality of channel capillary tubes; the quantitative switching valve is connected with the chromatograph and the experimental analyzer. Thedevice is simple in structure, the three-way electromagnetic valve and the vacuum diaphragm pump are controlled by matching with the chromatograph, multi-channel gas bag full-automatic sample injection can be achieved, manual extrusion is not needed, and the leakage possibility during gas sample injection is reduced; 48 samples can be analyzed at most once in a full-automatic sample injection analysis process; by adopting constant-pressure constant-flow internal-drawing type sample injection, the leakage phenomenon in the sample injection process is completely eradicated, the stable sample injection pressure is ensured, and the accuracy and repeatability of analysis data are improved.

Description

Technical field [0001] The invention relates to the technical field of toxic gas detection equipment, in particular to a multi-modal sample injection device. Background technique [0002] Gas chromatography (GC for short) is a major scientific and technological achievement that appeared in the 1950s. This is a new separation and analysis technology that has been used in industry, agriculture, national defense, construction, and scientific research. It is widely used. Gas chromatography refers to chromatography that uses gas as a mobile phase. Due to the fast transfer speed of the sample in the gas phase, the sample components can instantly reach equilibrium between the mobile phase and the stationary phase. In addition, there are many substances that can be used as stationary phases, so gas chromatography is a separation analysis method with fast analysis speed and high separation efficiency. [0003] At present, when analyzing gas samples with gas chromatograph, two methods are...

AI Technical Summary

Problems solved by technology

[0005] Moreover, because the existing technology mainly adopts artificial manual extrusion type sampling, it may cause the sample to leak into the air, and at the same time, due to the traditional manual extrusion of toxic and harmful gas samples, it will cause harm to the environment and the body of the staff.

At the same time, due to manual operation errors, the accuracy and repeatability of the analyzed data are affected

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