Size-dependent concentrations of polycyclic aromatic hydrocarbons in ambient air

Particle size-dependent concentrations of PAH from ambient air sampling were measured. Samples were taken with a five-stage cascade impactor (D-p < 10 mu m) and Berner-type low-pressure cascade impactors (D-p = 0.04-21 mu m and 0.06-16 mu m). 57 PAH and alkylated PAH were identified by GC-MS. 11 of them were quantified by HPLC with fluorescence detection. Parallel the concentrations of lead, bromine, zinc, sulphur and iron were determined by PIXE analysis and particle number-concentrations in the range D-p = 0.01-1 mu m were measured with a DMA (Differential Mobility Analyser).