Analysis of Polycyclic Aromatic Hydrocarbons in Environmental Air

In order to investigate the concentration and constitution of polycyclic aromatic hydrocarbons(PAHs) in environmental air,the sampling method for 16 PAHs in air was optimized,and the PAHs in the air sampled from 5 representative public places(including panel testing room,teahouse,restaurant,crossroads and Karaoke compartment) in Kunming with the method were analyzed by GC/MS under selected ion monitoring(SIM) mode.The results showed that:1) it was preferable to collect PAHs in air with silica gel adsorbent for 120 minutes at the air flow rate of 1.0 L/minute;2) except for those from panel testing room,dibenzoa,hanthrene was not detectable in all samples;3) the places in the order of total content of PAHs in air were panel testing room>teahouse>restaurant>crossroads>Karaoke compartment;4) except for teahouse,the constitution and distribution of PAHs in environmental air in all tested places were similar,while the concentration of each PAH was different;5) the contents of acenaphthene,fluoranthene and pyrene in the air of teahouse were obviously higher than those in the other 4 places.