Levels and profiles of polycyclic aromatic hydrocarbons in the Zagreb air in the heating season.

Samples of suspended particulate matter, collected at four sites in Zagreb during the heating season were analysed for the content of polycyclic aromatic hydrocarbons. Data were analysed with special reference to indicators of car traffic contribution the BghiPer/BaP and Cor/BaP ratios. Taking 1.5 as a borderline value for the BghiPer/BaP ratio, a significant influence of car traffic on air pollution by polycyclic aromatic hydrocarbons was noticed at a site close to a petrol station. Our data were compared with the BghiPer/BaP and Cor/BaP ratios from other countries. A similar relationship of the ratios between urban and traffic near sites was obtained.