摘要
采用预浓缩—GC-MS方法分析了北京市大气中挥发性有机物(VOCs)的组成,共检测出108种,其主要成分是饱和烷烃(33%)、芳香烃(21%)、烯烃(16%)、卤代烷烃(20%)、卤代烯烃(9%)和卤代芳香烃(1%),总VOCs平均质量浓度为(163 7±39 0)μg m3。更重要的是,在检出物中有54种是有毒有害的物质,主要成分是苯系物和卤代烃,其中苯,甲苯,丙烯,1,3-丁二烯,氯乙烯和1,2-二氯乙烷是含量最高的组分。
The chemical speciation of ambient VOCs in Beijing city was analyzed by using the method of pre-concentration-GC-MS. A total of 108 VOCs species were detected. The average mass concentration of VOCs in Beijing was (163.7±39.0) μg/m^3. The major components were alkanes, aromatics, alkenes, halogen alkanes, halogen alkenes and halogen aromatics which accounted for 33%, 21%, 16%, 20%, 9% and 1% respectively. The more important problem was that 54 species of toxic VOCs were detected in the ambient air of Beijing city, the main compounds were aromatics and halogen hydrocarbons, namely benzene, toluene, propylene, 1,3-butadiene, chloroethylene and 1,2 -dichloroethane.
出处
《环境科学研究》
EI
CAS
CSCD
北大核心
2004年第5期1-5,共5页
Research of Environmental Sciences
基金
国家自然科学基金资助项目(40275037)
