Determination of 7 kinds of benzene series compounds in air of closed space by gas chromatography
ZHANG Hongbin, LONG Qingyun, WEI Guihuan, CHEN Peihong
The 718 Research Institute of CSSC, Handan 056027, China
Abstract：A gas chromatography method for the determination of 7 kinds of benzene series compounds in air of closed space was established. The sample was collected via active carbon enrichment, then desorbed by carbon disulfide, and separated by DB-624 capillary column, the separation and accurate determination of 7 kinds of benzene series compounds such as iso-propyl benzene, n-propyl benzene, tert-butylbutene, n-butylbenzene, sec-butylbenzene, 1,3,5-trimethylbenzene, 1,2,4-trimethylbenzene was completed. Especially, 1,3, 5-trimethylbenzene and sec-butylbenzene, which were difficult to separate were separated completely. The calibration curves of 7 kinds of benzene series compounds had good linear relationship, the correlation coefficients of r2 were not less than 0.997. The average recovery was in the range of 83.2%-111.0%, the relative standard deviations were not more than 6.3%(n=6), and the detection limit was in the range of 0.02-0.06 mg/m3. The method has good selectivity, wide detection range and low detection limit, which can be used for determination of 7 kinds of benzene series compounds in air of closed space.
Keywords：GC; closd space; benzene series compounds
ZHANG H B，LONG Q Y，WEI G H，. Determination of 7 kinds of benzene series compounds in air of closed space by gas chromatography[J]. Chemical analysis and meterage，2020，29(3)：86-89.