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目的对青岛城阳水产品批发市场2011年6月~2012年5月期间销售的栉孔扇贝、太平洋牡蛎、紫贻贝、毛蚶和菲律宾蛤仔体内的铜(Cu)含量进行了为期一年的连续调查。方法每月定期取样,经湿式消解法消化后,采用火焰原子吸收分光光度法测定Cu含量。结果太平洋牡蛎的Cu含量平均值高达458.8 mg·kg-1·dw-1,远远超过其他四种贝类,其次是栉孔扇贝(平均值为11.0 mg·kg-1·dw-1),剩余三种贝类的Cu含量较接近(平均值在4.5~5.7 mg·kg-1·dw-1之间)。除太平洋牡蛎外,另外四种贝类的Cu含量无论以干重还是湿重计均未超过国标规定的50 mg·kg-1。各种贝类(毛蛤除外)体内的Cu含量随季节的变化无明显的规律性。结论 2011年6月~2012年5月期间青岛城阳水产品批发市场销售的太平洋牡蛎的Cu污染情况较为严重,其Cu污染的问题应受到足够重视。
Objective To study the Cu content of Chlamys farreri, Pacific oyster, Mytilus edulis, Scylla serrata and Ruditapes philippinarum sold from June 2011 to May 2012 in Chengyang Aquatic Products Wholesale Market of Qingdao for one year Continuous investigation. Methods The samples were taken regularly every month and after digestion by wet digestion method, the Cu content was determined by flame atomic absorption spectrophotometry. Results The average content of Cu in Pacific oyster was as high as 458.8 mg · kg-1 · dw-1, far exceeding that of the other four species of shellfish, followed by chlamys farreri (average 11.0 mg · kg-1 · dw-1) The remaining three shellfish Cu content closer to (average of 4.5 ~ 5.7 mg · kg-1 · dw-1 between). In addition to the Pacific oysters, the Cu content of the other four shellfish did not exceed 50 mg · kg-1 as specified in the national standard, either by dry weight or wet weight. There is no obvious regularity of Cu content in all kinds of shellfish (excluding clam) with the change of seasons. Conclusion The results show that the pollution of Cu in Pacific oyster which is sold in Qingdao Chengyang Aquatic Products Wholesale Market is rather serious from June 2011 to May 2012, and the problem of Cu pollution should be given enough attention.