Measurement of Polycyc ic Aromatic Hyd-rncarbons in Total Suspended anal Inhalable Particulate Matter in the Atmosphere

The methods of extrrction and measurement of polycyclic aromatic hydrocarbons were reported,Total suspended particulate matter (TSP) and inhalable one (IP) were extracted by Soxhlet method with dichlormethane as solvent,followed by further fractionation with silicagel column chromatography to remove the interference from aliphatic hydrocarbon,Polycyclic aromatic hydrocarbons were eluted with hexane and benzcne(1:1)and the elute wss concentrated by rotating evaporator and this was followed by chrcmatographic determination with selfmade 5E-52 glass capillary column and hydrogen flame detector,The average recovery-rate of 5 representative polycyclic arcmatic hydrocarbons ranged 84.3-100.2% on repeated measurement,The method showed good reproducibility with a coefficient of variance around 10% and the minimal detectable concentration was 1-2r/m.More than 12 polycyclicn aromatic hydrocarbons in TSP and TP samples cotlected from Beijing,Shanghai,Taiyuan and Wuha were measured by this method with satisfactorreysults.