Metals Analysis in Common Carp (Cyprinus Carpio) from Shirinsu Wetland, Hamedan Province, Iran

Background & Aims of the Study: Concentrations of Cd, Hg and As were measured byatomic absorption spectrometry (AAS) in muscle, liver and gill tissues of common carpfrom the Shirinsu Wetland during February to March 2013.Methods: Fish samples (Cyprinus carpio) were caught from Shirinsu Wetland, westernIran from February to March 2013. Specimens were frozen in prewashed polyethylene bagsand frozen samples brought to the laboratory in ice chests. Samples (2 g) were digestedwith 5 ml of HNO3 (65% v/v), 1 ml of H2O2 (30% v/v) with a microwave oven. A blankdigest was carried out in the same way. The digestion program began at a potency of1200W then ramped for 10 min, after which samples were held for 10 min at 1200W. Thesecond step began at a potency of 0W and held for 15 min. All metal concentrations weredetermined on a wet weight basis as μg g−1.Results: Metal levels measured in muscle tissue were in the following ranges (μg g−1): Cd0.007-0.011, Hg 0.006-0.01 and As not detected. In liver tissue were (μg g−1): Cd 0.035-0.043, Hg and As not detected. In gill tissue were (μg g−1): Cd 0.31-0.55, Hg 0.002-0.004and As 0.001-0.003. The results presented on metal contents in the examined tissues givean indication of the environmental conditions. Concentrations of Cd, Hg and As obtainedwere far below the established values by the European Community Regulations. However,Cd level found in gill tissue was higher than the recommended legal limits for humanconsumption and as such may cause a human health issue.Conclusion: Analytical data shows that the metal concentrations for the fish tissues weregenerally within the FAO/WHO, ASTDR and EEC recommended limits for fish. Thereforethere is no serious health risk associated with the consumption of the three studied metals inthe muscle and liver tissues analyzed

کلیدواژه ها:

Heavy Metal ، Food Safety ، Cyprinus carpio ، Wetland ، ShirinSu ، Iran