bioaccumulation and exposure assessment of lead and cadmium due to consumption of penaeus semisulcatus a post-market surveillance in tehran 2012

abstract background: fisheries safety control and considering heavy metal accumulation is one of the most important factors in maintaining health society and assuring the safety of this valuable food. the purpose of this study is evaluating the potential of bioaccumulation and exposure to lead and cadmium due to consumption of penaeus semisulcatus in tehran city 2012.. methods: samples were collected randomly from four main market retail in south, north, east and west in tehran city 2012 in time interval that penaeus semisulcatus was delivered in fresh and non-freeze form. after preparation and digestion of muscle and skin parts, the lead and cadmium was determined by inductively coupled plasma – optical emission spectroscopy (icp-oes) and the exposure of the consumers to these elements was evaluated. findings: the results revealed that the mean value for lead accumulation in skin and muscle were 5.37±1.59 and 5.59±1.12 and for cadmium were 1.11±0.61 and1.79±0.62 µg.kg -1 respectively. the mean concentration of lead and cadmium in muscle part was greater than its skin. the difference between lead and cadmium accumulation in edible part was not significant. the exposure of consumers to lead and cadmium due to the consumption of edible part of penaeus semisulcatus were fifty and thirty times less than its regulated value for provisional tolerable daily intake. conclusion: the lead and cadmium mean concentration in edible part of penaeus semisulcatus were less than national and international limits and so its consumption is not risky for human health. the useful results of the survey from market retail can be used as a model for monitoring the safety of shrimp and other aquatics. key words: heavy metals, penaeus semisulcatus, inductively coupled plasma (icp), market retail