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《化学分析计量》 2020年第03期
DOI:10.3969/j.issn.1008-6145.2020.03.020
气相色谱法测定密闭空间空气中7种苯系物
张洪彬,龙庆云,韦桂欢,陈培红
中国船舶集团有限公司第七一八研究所,河北邯郸 056027 
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 
摘要:建立气相色谱法测定密闭空间空气中异丙苯等7种苯系物的方法。采用活性炭富集采样,二硫化碳解吸样品,DB-624毛细管柱分离,实现了对异丙苯、正丙苯、特丁苯、正丁苯、仲丁基苯、1,3,5-三甲苯、1,2,4-三甲苯等7种苯系物完全分离并准确测定,特别是可以将难分离的1,3,5-三甲苯和仲丁基苯完全分离。建立的7种苯系物工作曲线线性良好,相关系数r2≥0.997,加标回收率在83.2%~111.0%之间,测定结果的相对标准偏差不大于6.3%(n=6),方法检出限为0.02~0.06 mg/m3。该方法选择性好,测量范围宽,方法检出限低,可用于密闭空间空气中异丙苯等7种苯系物的测定。 
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. 
关键词:气相色谱法;密闭空间;苯系物 
Keywords:GC; closd space; benzene series compounds 
本文引用格式:
张洪彬,龙庆云,韦桂欢,等.气相色谱法测定密闭空间空气中7种苯系物[J].化学分析计量,2020,29(3):86-89.
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. 

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