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Recent advances in micro detectors for micro gas chromatography

Science China Materials 2019年第5期62卷 611-623页

作者： Hemi Qu Xuexin Duan State Key Laboratory of Precision Measuring Technology & Instruments Tianjin University Key Laboratory of Advanced Energy Materials Chemistry(Ministry of Education) Nankai University College of Precision Instrument and Opto-electronics Engineering Tianjin University

micro gas chromatography(μGC) has been continuously gaining attention since the last century owing to multiple favorable characteristics, such as its small size, low power consumption and minimal production and maintenance costs.μGC has the potential to provide practical solutions to emerging analytical challenges in security, health,and environment. In this review, we summarize recent advances in micro detectors for μGC, including the study of the miniaturization of conventional detectors and the development of novel detectors for μGC chromatography.

关键词： micro detector gas sensor micro gas chromatography micro-electro-mechanical system

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Effect of staggered array structure on the flow field of micro gas chromatographic column

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Chinese Physics B 2022年第1期31卷 208-214页

作者： Daohan Ge Zhou Hu Liqiang Zhang Shining Zhu Institute of Intelligent Flexible Mechatronics Jiangsu UniversityZhenjiang 212013China National Laboratory of Solid State microstructures School of PhysicsNanjing UniversityNanjing 210093China

A new design of staggered array semi-packed micro gas chromatographic column was presented based on the micro electromechanical system(MEMS)*** was a sensor for gas sample *** internal velocity fields of ten types of semi-packed micro gas chromatographic column were *** effects of array spacing and dislocation spacing on the flow field distribution were *** results show that on the basis of ensuring the formation of virtual wall,with the increase of array spacing,the maximum velocity difference between the flow channels in the vertical direction decreases gradually,but the velocity difference in the flow channels a and b *** the inlet velocity was set to be 0.18 m/s,the maximum velocity difference in the channel of the staggered semi-packed micro gas chromatography column 3(CSAC3)was 0.05610 m/*** maximum velocity difference in the channel a was 0.09160 m/*** maximum velocity difference in the channel b was 0.02401 m/***3 had a more uniform velocity field distribution,which can effectively suppress the laminar flow effect during chromatographic separation,and had a smaller pressure distribution,which puts forward lower requirements for carrier gas *** staggered array semi-packed micro gas chromatography column proposed in this paper can effectively improve the velocity field distribution and pressure distribution in the channel,and provide a theoretical basis for the design of the new micro gas chromatography column structure.

关键词： micro electromechanical system(MEMS) micro gas chromatography

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