【摘要】 <正> 多环芳烃(PAH)是一类重要的化学致癌物质,它们产生自燃烧过程并粘附于大气飘尘上,已有确实的证据认为PAH可以诱发肺癌,导致城市居民肺癌发病率增高。燃料的结构及烧燃过程的控制决定了PAH污染大气的状况,大气颗粒物中的PAH量是综合评价该地大气环境污染的重要指标。 毛细管气相色谱/质谱(HRGC/MS)联用方法是分离,鉴定少于六个母环的PAH更多还原

【Abstract】 By using GC/MS system with a capillary column, a method for determining the PAH particles in the atmosphere has been established. The sensitivity of the system increases with GROB injection technique. The air samples taken from Shijingshan District were analysed. It was found that a total of 126 PAH compounds were present in the sample. Apart from many PAH compounds with alkyl substitutions, PAH compounds with heteroatoms, such as sulphur, nitrogen and oxygen also existed. Quite a number of them are carcinogenic.更多还原