PCDD/Fs and dioxin-like PCBs in fish species from Lake Victoria, East Africa
| Autor: | Bernard T. Kiremire, Patrick Ssebugere, Karl-Werner Schramm, Silke Bernhöft, Bernhard Henkelmann, Gabriel N. Kasozi, John Wasswa |
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| Rok vydání: | 2013 |
| Předmět: |
Polychlorinated Dibenzodioxins
Environmental Engineering Isotope dilution method Health Toxicology and Mutagenesis Nile perch Nile tilapia Animals Environmental Chemistry media_common.cataloged_instance European union Benzofurans media_common biology Muscles Fishes Public Health Environmental and Occupational Health General Medicine General Chemistry Africa Eastern Dibenzofurans Polychlorinated biology.organism_classification Polychlorinated Biphenyls Pollution Lates Fishery Lakes Oreochromis Congener Environmental chemistry Environmental Pollutants Polychlorinated dibenzofurans Environmental Monitoring |
| Zdroj: | Chemosphere. 92:317-321 |
| ISSN: | 0045-6535 |
| Popis: | Two commercially important fish species, Nile perch (Lates niloticus) and Nile tilapia (Oreochromis niloticus) belonging to different trophic levels were collected from the Napoleon Gulf and Thurston Bay in Lake Victoria. Polychlorinated dibenzo-p-dioxins (PCDDs), polychlorinated dibenzofurans (PCDFs) and dioxin-like polychlorinated biphenyls (dl-PCBs) were extracted from the fish muscles and livers using the (13)C isotope dilution method, followed by multiple column chromatography clean-up. Analysis was achieved by a high resolution gas chromatography coupled with a high resolution mass spectrometer. The concentrations of analytes ranged from 0.07 to 0.59pgg(-1) fresh weight (fw) and 0.3-19.0pgg(-1) in L. niloticus and 0.06-0.18 and 0.2-15.7pgg(-1) in O. niloticus, for ∑PCDD/Fs and ∑dl-PCBs, respectively. Differences in congener concentrations were observed between the two fish species and study sites, and this was attributed to differences in feeding habits and trophic levels. World Health Organization-toxic equivalents (WHO-TEQs) were in the range 0.01-0.16pgTEQg(-1) for the PCDD/Fs and 0.001-0.74pgTEQg(-1) for the dl-PCBs. The TEQ values in the present study were lower compared to those of most fish samples reported in literature and were within permissible levels recommended by the European Union, implying that the fish was fit for human consumption. |
| Databáze: | OpenAIRE |
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