Automatic sampling pretreatment device and method for gas chromatography determination of phosphine

Abstract

The invention discloses an automatic sampling pretreatment device and method for gas chromatographic determination of phosphine, wherein the automatic sampling pretreatment device for gas chromatography determination of phosphine mainly consists of an automatic sampler, six A through valve, a drier, an exhaust gas collection bag and a cold trap device are all connected to the six-way valve. When working, the first plastic syringe and the second plastic syringe in the autosampler provide gas samples, make the samples flow through the six-way valve, and then adjust the six-way valve to make the samples enter the corresponding parts. The present invention uses an automatic sample injector instead of manual sample injection, which reduces manual operation errors, and uses the cooperation of the automatic sample injector and the six-way valve to obtain a comparison of the volume difference between the automatic sample injection gas and the tail gas, so as to judge the automatic sample injection pretreatment device. Whether it has good sealing performance, so as to ensure that the error of the experimental results is small and the accuracy is high.

Description

Technical field[0001]The present invention relates to phosphating hydrogen determination techniques, and more particularly to automatic injection pretreatment devices and methods for determining phosphate chromatography.Background technique[0002]Phosphastine is a colorless, flammable, toxic gas, boiling point -87.7 ° C, melting point -132.8 ° C, strong reductive, which is easily oxygenated, and is extremely easily converted to phosphorus under illumination conditions. The study of phhyphosphine is not only important to the biological geochemical cycle of phosphorus elements, but also provides a new solution for eutrophication of the increasingly severe water body.[0003]The detection method of phosphate is mainly molybdate spectrophotometry and gas chromatography. The ultraviolet spectrophotometry is only suitable for the determination of high concentration phosphine, and has a low sensitivity and lack of flexibility. In the natural environment, the content of hydrogen phosphide is v...

AI Technical Summary

Problems solved by technology

However, the technical personnel of domestic small and medium-sized enterprises and the graduate students of scientific research institutions are relatively frequent, and there are problems such as unstable sampling speed caused by unskilled operation.

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