Citation:
TIAN Bo-Wen, FENG Fei, ZHAO Bin, LUO Fan, YANG Xue-Lei, ZHOU Hai-Mei, LI Xin-Xin. Study of Monolithic Integrated Micro Gas Chromatography Chip[J]. Chinese Journal of Analytical Chemistry,
;2018, 46(9): 1363-1371.
doi:
10.11895/j.issn.0253-3820.181027
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A monolithic micro gas chromatography (μGC) chip integrated by a micro separation column (μSC) and a micro thermal conductivity detector (μTCD) was fabricated based on micro-electro-mechanical system (MEMS) technique. Compared with the state of the art, the μSC with high depth-to-width ratio channels, coated with mesoporous silica nanoparticles as stationary phase, could effectively improve the column capacity and separation performance. Besides, the stable suspending μTCD, which was designed and fabricated in two ports of the μGC chip, could availably enhance the thermal isolation and reliability of the device. The mixture of light hydrocarbons (methane, ethane, propane and butane) could be separated by base line and detected by this monolithic integrated μGC chip, in which the overall analysis and detection time was only 33 seconds, the separation resolution of ethane and propane was 8.34, and the number of theoretical plates was as high as 11420. This monolithic integrated μGC chip had the advantages including good separation resolution, high column efficiency and short analysis time, which was highly suitable for portable gas chromatographic field and onsite detection.
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