AI Article Synopsis
- Researchers assessed PCB levels in crucian carp across 20 sites in Korea, using advanced gas chromatography to identify and quantify 28 different PCB congeners ranging from tri- to hepta-CBs.
- The study aimed to evaluate the degree of PCB contamination in freshwater fish and analyze how PCB concentrations varied among the sampling locations, influencing environmental assessments.
- Total PCB concentrations at sites varied widely, with the highest levels found near the Nakdong estuary, and the predominant congeners identified were PCB 153 and 138, primarily consisting of penta- and hexa-chlorinated biphenyls.
Article Abstract
Polychlorinated biphenyls (PCBs) levels in crucian carp were determined at 20 locations along four major river systems, several small-scale rivers and a wetland in Korea. Twenty-eight congeners, ranging from tri- to hepta-CBs were detected. A gas chromatograph with a mass selective detector was used to quantify the individual PCB congeners. The objectives of this study were to investigate the levels of contamination of PCBs in freshwater fish and to observe the pattern of their distribution. The sampling locations were chosen among 31 sampling sites that are currently used as environmental residue checkpoints by the Korean Ministry of Environment. Concentrations of individual congeners ranged from not detectable (n.d.) to 0.75 ng g(-1) on a wet weight basis. The total concentrations of PCBs at each site ranged from n.d. to 5.41 ng g(-1) of wet weight. The most heavily contaminated site was the Nakdong estuary located near the Shinpyung-Janglim factory district. The PCB 153 and 138 were the principal congeners and penta- and hexa-chlorinated biphenyls comprised the main congener groups.
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| http://dx.doi.org/10.1016/j.chemosphere.2005.04.063 | DOI Listing |
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