Title: Analysis and risk assessment of total mercury and methylmercury in aquatic products in Beijing market
Abstract: The objective of this paper is to analyze the total mercury and methylmercury concentrations in aquatic products in Beijing market,and evaluate the exposure risk to human beings.Nine seawater species and two fresh water species were sampled from Beijing market.Methylmercury was extracted and concentrated based on the method of toluene extraction and cystein back-extraction.The final extracts were analyzed according to the method of US EPA 7473.The results showed that methylmercury accounted for 74.5%-96.0% of the total mercury in the muscle of the tested samples.The methylmercury concentration in different organs followed the order of musclelivergills.Compared with the China national standard for aquatic products(GB 2762-2005 and GB 2733-2005),the methylmercury concentration of the measured samples was all below the standard value.However,according to the criteria of the maximum allowable methylmercury intake from WHO and EPA,consumption of the seawater fishes with high methylmercury concentration(such as Anoplopoma fimbria) should be limited.
Publication Year: 2010
Publication Date: 2010-01-01
Language: en
Type: article
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Cited By Count: 1
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