Akademik Veri Yönetim Sistemi
10th Regional IUAPPA Conference, İstanbul, Türkiye, 23 - 26 Eylül 1997, ss.317-322, (Tam Metin Bildiri)
Ambient air samples were collected in Chicago, IL between June 1995 and October 1995 to determine concentrations and particle/gas phase distributions of polycyclic aromatic hydrocarbons (PAHs) and polychlorinated biphenyls (PCBs). A modified high-volume sampling method (PS-1 sampler) was employed to collect airborne PAHs and PCBs in both the particulate and gas phases. A gas chromatograph equipped with a mass selective detector (MSD) was used to analyze samples for PAHs. A gas chromatograph equipped with an electron capture detector (ECD) was utilized in PCB analysis. The average Sigma PAHs and Sigma PCBs were 422 ng/m(3) and 1.78 ng/m(3) respectively. Phenanthrene was the most abundant PAH compound and it accounted for 42% of Sigma PAHs. The most abundant PCB compound was PCB 101. This compound accounted for 9% of Sigma PCBs. The particle/gas phase distribution showed a wider range for PAHs than PCBs. The gas phase percentage generally decreased with increasing PAH molecular weight. Generally a decrease in gas phase percentage was observed with increasing PCB molecular weight. Majority of the PCBs were associated with the gas phase.