Determination of presence and quantification of cadmium, lead and copper in Nile tilapia (Oreochromis niloticus) fillets obtained from three cold storage plants in the State of Parana, Brazil
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Sociedade Brasileira de Ciência e Tecnologia de Alimentos
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Pisciculture is an economic activity that is steadily growing in the state of Parana, Brazil, and Nile tilapia (Oreochromis niloticus) is one of the widely cultivated species in this state. Tilapia is not only a very nutritious food, but also an important indicator of environmental contamination. This study aimed to verify contamination by cadmium, copper and lead in tilapia fillets, and to compare the found values to international legislations. Were collected 135 samples of tilapia fillets, between July 2006 and May 2007, in three fish stores located in regions west and north of Paraná State. Samples of tilapia fillet were analyzed in relation to the presence of cadmiun, lead and copper, using atomic absorption spectrophotometry. Lead has not been detected in the analyses. Cadmium has been detected in three samples, on concentrations of 0.012 μg.g–1, 0.011 μg.g–1 and 0.014 μg.g–1. Copper has been detected in all fillets, and the average concentration of each cold storage plant was of 0.122 μg.g–1, 0.106 μg.g–1 and 0.153 μg.g–1. The concentrations found in this study are within the limits allowed by both the European and the Australian legislations.
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Agrociencias