2种贝类化学组成和重金属含量分析

Analysis on the Chemical Composition and Contents of Heavy Metals in Two Shellfishes

[目的]分析青蛤和杂色蛤的化学组成和铁、锌、铜、铅、铬的含量。[方法]以连云港市售的青蛤和杂色蛤为试材,对其软体部分的一般化学组成及铁、铜、锌、铅、铬含量进行分析。[结果]青蛤和杂色蛤软体组织中蛋白质含量(以干基计)分别为44.06%和57.09%,脂肪含量(以干基计)分别为11.31%和13.52%,是高蛋白、低脂肪的水产品;重金属含量(以鲜重计),铁分别为200.63和120.74 mg/kg,锌分别为15.27和5.13 mg/kg,铜分别为2.14和1.93 mg/kg,铅分别为0.17和0.23 mg/kg,铬均未检出。[结论]青蛤和杂色蛤的蛋白质含量较高,脂肪含量较低,含有一定量的微量元素铁、锌和铜,且锌、铜、铅、铬的含量均低于我国无公害水产品安全要求(GB18406.4-2001)中的限量标准,可满足人体对微量元素的部分需要。

[ Objective ] The study aimed to analyze the chemical composition and contents of Fe, Zn, Cu, Pb, Cr in Cyclina sinensis and Venerupis variegate. [ Method ] With C. sinensis and V. variegate sold on the market of Lianyangang as the tested material, the general chemical composition and contents of Fe,Zn,Cu,Pb,Cr in their soft tissues were analyzed. [ Result] In the soft tissues C. sinensis and V. variegate,the protein content （dry weight, dw） reached 44.05% and 57.09% resp. , the fat content （dw） were 11.31% and 13.52%, and their heavy metals （wet weight,ww） were 200.63 and 120.74 mg/kg for Fe resp. , 15.27 and 5.13 mg/kg for Zn resp. ,2.14 and 1.93 mg/kg for Cu resp. , O. 17 and 0.23 mg/kg for Pb resp. ,and were undetected for Cr resp. [ Conclusion] C. sinensis and V. variegate had higher protein content and lower fat content and had microelements of Fe,Zn and Cu with some amount and the content of Zn,Cu,Pb and Cr were all lower than the limits of the metals in national free-pollutant seafood safety requirements （GB18406.4-2001） and could meet the microelements requirements of human body.