广州市场食用鱼和贝类重金属含量及评价  

Evaluation of Heavy Metals in Edible Fishes and Bivalves Available in a Market in Guangzhou City

作　　者：杨丽华[1] 方展强[1] 郑文彪[1] 伍育源[1] 

机构地区：[1]华南师范大学生物系,广州510631

出　　处：《环境科学与技术》2002年第6期15-16,34,共3页Environmental Science & Technology

基　　金：广东省科委科技攻关项目资助 (2KB0 540 2N)

摘　　要：以高氯酸 -硝酸消化法和火焰原子吸收分光光度计测定了广州石牌市场食用鱼类和双壳贝类的Cd、Pb、Cr、Ni、Cu和Zn等重金属的含量。结果表明 ,双壳类对重金属积累的能力高于鱼类。鱼类不同组织器官对各种重金属积累能力明显不同 ,有毒重金属元素Cd、Pb、Cr和Ni主要分布于鳞片、鳃中 ,其食用部分中各重金属含量都远低于“PHNSO”和“人体卫生消费标准” ,具安全的食用价值。但贝类的Cd含量已超过“人体卫生消费标准” ,其中牡蛎的Cu和Zn含量则略超过“人体卫生消费标准” ,其食用价值受到严重威胁 。Heavy metals: Cd, Pb, Cr, Ni, Cu and Zn are analyzed for their concentrations in flesh of the fishes (six species) and bivalves (six species) collected from Shipai Market in Guangzhou. Analytical results show the higher heavy metals contents of bivalves flesh than those of fishes, indicating the bivalves greater liability to bio accumulation of heavy metals. In regard to fish, the investigation reveals different contents of heavy metals in different tissues: toxic metals mainly are accumulated in scales and gills. Based on the investigation, an evaluation is made for the safety of edible fishes and bivalves presently purchasable in Guangzhou s markets.

关 键 词：贝类 重金属含量 食用鱼类 重金属污染 评价 广州市 食品卫生 食物污染 

分 类 号：X56[环境科学与工程—环境工程] R155.55[医药卫生—营养与食品卫生学]