Examination of seasonal variability of indicator polychlorinated biphenyls in nile perch products from lake Victoria, Tanzania
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Date
2021
Journal Title
Journal ISSN
Volume Title
Publisher
TAJAS
Abstract
In the current study, Nile perch products were analysed for seasonal variations in the levels
of indicator polychlorinated biphenyls (PCBs). Samples of fish products were collected from Lake
Victoria during the dry and rainy seasons and extracted using a common method referred to as
QuEChERS (quick, easy, cheap, effective, rugged and safe) methodology. The residues of PCBs in
fish samples were detected and quantified by using a Gas Chromatography equipped with Electron
Capture Detectors and a Gas Chromatography equipped with Mass Spectrometer (GC-ECD/GC-
MS). The concentrations of indicator PCBs in fish samples were generally greater during the
rainy seasons than the dry seasons suggesting that seasonality has significant impacts on PCBs
contamination in fish. However, the total PCBs in fish in the current study for both seasons were
lower than the Maximum Recommended Limits of 75μg/kg that is set by the European Commission
for fish and other fishery products. This indicates that the Nile perch products from Lake Victoria
are safe for human consumption based on the studied toxicants
Description
Keywords
Indicator PCBs, Seasonality, POPs, Fresh muscles, Processed fish products