Abstract: Micro gas chromatography column is designed and fabricated by using MENS processing technology.CB-40 (40% phenyl polysiloxane+60% dimethyl polysiloxane) fixed phase is selected to coat the chromatography column according to characteristics of the odor gases to be separated,gaining a capillary column microcolumn as the first-dimension column.The micro packed chromatography column is fabricated by using the same stationary phase as the Bond Plot Silica and is used as the second-dimension separation column.Typical mixed malodorous gases including hydrogen sulfide,methyl mercaptan,carbon disulfide,dimethyl sulfide,benzene,toluene,ethylbenzene,xylene and styrene are selected to perform separation detection.A whole set of sampling acquisition module and control heating module is designed and manufactured,and the self-made tubular concentrator and the photoionization detector with high sensitivity and small size are employed,which helps to improve the detection accuracy greatly.By this method,the detection limit of benzene can reach 0.174 μg·mL-1 and the detection limit of hydrogen sulfide can reach 0.133 μg·mL-1.
周琪, 张思祥, 李俊成, 赵业佳, 周围. 基于光离子化技术的二维气相色谱检测系统研究[J]. 现代化工, 2018, 38(4): 225-228,230.
ZHOU Qi, ZHANG Si-xiang, LI Jun-cheng, ZHAO Ye-jia, ZHOU Wei. Research on two-dimensional gas chromatography detection system based on photoionization technology. Modern Chemical Industry, 2018, 38(4): 225-228,230.
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