Analysis and determination of mercury, cadmium and lead in canned tuna fish marketed in Iran

Department of Agricultural Extension and Education, Islamic Azad University, Garmsar, Iran
AFRICAN JOURNAL OF BIOTECHNOLOGY (Impact Factor: 0.57). 09/2010; 9(31):4938-4941.


The objective of this study is to determine mercury, cadmium and lead concentrations in 60 canned tuna fish samples produced and distributed in Iran after digestion by the standard methods of the Association of Official Analytical Chemists. Mercury contents in canned tuna fish were determined by cold vapor atomic absorption spectrophotometry while cadmium and lead were determined by graphite furnace atomic absorption spectrophotometry. The metal contents, expressed in g g -1 wet weight for mercury, cadmium and lead varied from 0.010 to 0.401 (average of 0.125), 0.008 to 0.150 (average of 0.050) and 0.021 to 0.301 (average of 0.096), respectively. The values were comparable and in the range of the literature values. The results of this study indicate that tuna fish produced and marketed in Iran have concentrations well below the standards of FAO/WHO levels of these toxic metals.

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Available from: Ebrahim Rahimi, Jun 23, 2014
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    • "Shrimp and crab show potential as a metal biosentinel because they are relatively sedentary, abundant, and are commonly found in both nonpolluted and polluted environments. Shrimp and crabs have been well established as bionindicators for monitoring the concentration of heavy metals in many areas of the world (Darmono and Denton, 1990; Hosseinkhezri and Tashkhourian, 2011; Kargin et al., 2001; Kress et al., 1998; Mantelatto et al., 1999; Palmer and Presley, 1993; Rahimi et al., 2010; Raissy et al. 2011; Vazquez et al., 2001). This study was undertaken to determine the concentration of cadmium of two shrimp species, namely, Penaeus semisulcatus and Penaeus monodon caught from the coastal areas in southern Iran. "
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    • "Such findings led the Food and Drug Administration (FDA, 2001) to issue a consumption advisory whereby pregnant women and women of childbearing age should avoid consuming shark, swordfish, king mackerel, and tilefish (FDA, 2001). Despite the wide range of available data on mercury in fish globally (Rahimi et al., 2010; Islam et al., 2010; Voegborlo and Akagi, 2005, Lam and Sia Su, 2009), there is only one report that evaluates the total mercury levels in canned and frozen imported fish into Lebanon (Aftim et al., 1981). The study was carried out 36 years ago and did not include fresh fish caught in the area; a category which is preferred over frozen fish or canned fish by most Lebanese. "
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