卷烟主流烟气中挥发性醛酮和苯的P&T-GC分析

Analysis of volatile aldehydes ketones and benzene in mainstream cigarette smoke by purge and trap-gas chromatography

挥发性羰基化合物和苯是卷烟烟气中重要的有害物质，为此建立了P＆T—GC法测定卷烟样品主流烟气中的乙醛、丙醛、丁醛、丙酮、2-丁酮和苯。该方法不用2，4-二硝基苯肼（DNPH）衍生化，不用有机溶剂萃取和浓缩，减少了对环境的污染，具有灵敏度高、检出限低、定量准确、操作简便等特点。结果表明：方法有较好的重复性，相对标准偏差在5．39％以下；检出限为0．85ng／支～6．55ng／支；6种物质的回收率在89．22％～98．21％之间。

Volatile carbonyls and benzene are possible sources of carcinogenicity in cigarette smoke. So the analytical method of acetaldehyde, propionaldehyde, butyraldehyde ,acetone ,2-butanone and benzene in mainstream smoke of cigarette samples has been established by purge and trap-gas chromatography. The compounds can be extracted and concentrated without derivation with 2,4- dinitrophenylhydrazine and organic solvent being involved. The method was with high sensitivity, low detection limit, accurate quantification, and simple operation. Results showed that this method achieved excellent reproducibility and the relative standard deviations were generally below 5.39%. Detection limits of this method was 0. 85 ng/cig - 6.55 ng/cig. The recoveries were in the range from 89.22% to 98.21%.