Abstract
This research looked at the concentration levels of some heavy metals in tissues and organs of imported frozen European hake Merluccius merluccius (Linnaeus, 1758). This to ascertain the safety of the fish for consumption and whether long time freezing could bio concentrate heavy metals in the fish. Fish were procured from the market, muscles, gills and liver removed, digested for analysis of Cu, Zn, Mn, Fe, Cd, and Pb using AAS. Fe was the most accumulated metal with 4.393±0.19 mg/kg, Cadmium (Cd) was the least with 0.004±0.00 mg/kg (Fe>Zn>Cu>Pb>Cd>Mn). Muscle accumulated the most metals. Concentrations of the metals were below maximum limit recommended by Food and Agricultural Organization/World Health Organization (FAO/WHO), which shows the fish is safe for consumption. It also showed that long time freezing does not bio concentrate heavy metals in the fish about a month of freezing. It is recommended that regulatory authorities should always conduct an assessment of the heavy metals in imported frozen marine fishes before it is cleared for human consumption. This will guide against any adverse health risk associated with consumption of fish with high levels of heavy metals.
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