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Research Article
 

Heavy Metal Analysis of Consumer Fish Sold in Three Selected Markets in Awka, Anambra State, Nigeria



C.F. Ikeogu, H.F. Ogbonnaya, K.P. Okpala-Ezennia and C.G. Nwankwo
 
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ABSTRACT

Background and Objective: There is a growing concern on the safety of consumer fish procured from various markets in Nigeria. This study investigated the concentrations of five heavy metals; cadmium (Cd), manganese (Mn), mercury (Hg) lead (Pb) and zinc (Zn) in the muscle of three types of consumer fish (smoked fish, fresh fish and imported frozen fish) sold in three selected markets in Awka, Anambra State. Materials and Methods: The samples analyzed were: Fresh fish (Clarias gariepinus), imported frozen fish (Scomber scombrus) and smoked fish (Clarias gariepinus and Oreochromis niloticus). The concentrations of the metals were quantified using a Varian AA240 fast sequential Flame Atomic Absorption Spectrophotometer (AAS). Results: The results obtained showed that metal concentrations in the muscles of the different fish samples were in the range of zinc, 0.660-6.830 mg kg1; manganese, 0.043-3.230 mg kg1; cadmium, 0.002-0.068 mg kg1; lead, 0.045-0.463 mg kg1 and mercury, 0.097-0.403 mg kg1. This study revealed that cadmium, mercury and zinc in the fish samples were all below the limits recommended by Food and Agricultural Organization (FAO)/World Health Organization (WHO) except lead and manganese whose levels exceeded the FAO/WHO standard in smoked fish and fresh fish obtained from Nkwo Amenyi market. Conclusion: Fish sold in Awka metropolis is safe for human consumption except smoked fish and fresh fish procured from Nkwo Amenyi Market. This study recommends continuous monitoring and proper quality control of the consumer fish sold in Awka, Anambra State, Nigeria for public safety.

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  How to cite this article:

C.F. Ikeogu, H.F. Ogbonnaya, K.P. Okpala-Ezennia and C.G. Nwankwo, 2021. Heavy Metal Analysis of Consumer Fish Sold in Three Selected Markets in Awka, Anambra State, Nigeria. Singapore Journal of Scientific Research, 11: 17-22.

DOI: 10.3923/sjsres.2021.17.22

URL: https://scialert.net/abstract/?doi=sjsres.2021.17.22
 

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