Levels and risk assessment of selected persistent organic compounds in dust samples from Tianjin, China

Abstract

The aim of this paper was to determine spatial variation of 6 indicator polychlorinated biphenyls (PCBs) and 18 organochlorine pesticides (OCPs) in street dust samples (n=49) collected during summer season from suburban/urban zones of Tianjin, China. Sample preparation was performed by using accelerated solvent extraction with simultaneous extraction and clean-up of PCBs and OCPs, while quantification was carried out using gas chromatography coupled with micro-electro absorption detector and gas chromatography coupled with mass spectrometry. The total concentrations of studied PCBs varied from