Polycyclic aromatic hydrocarbons at different crossroads in Zagreb, Croatia.

Polycyclic aromatic hydrocarbons (PAHs) were measured in the PM(10) particle fraction collected at two different measuring sites in Zagreb, Croatia. In summer, concentrations of all PAHs at both sites were low. In winter, mass concentrations of all PAHs measured at southern site were much higher than those at north. Contents of all PAHs in the PM(10) particle fraction were much lower in summer than that in the winter period. For example, average content of BaP in PM(10) in summer was 2.26 ng/mg at site A and 4.17 ng/mg at site B, while in winter it was 34.72 and 46.69 ng/mg, respectively.