四溴双酚A在5种巢湖鱼类体内的组织分布与生物浓缩因子研究

Tissue Distribution and Bioconcentration Factors of Tetrabromobisphenol A in Five Fishes in Lake Chaohu

利用SPE-HPLC法,分析了四溴双酚A(TBBPA)在巢湖5种经济鱼类体内的组织分布及生物浓缩因子.结果表明,TBBPA在5种鱼体内的平均含量(以干重计)为4.70～11.20 ng.g-1,高低排序为白鱼>白鲢>鳙鱼>鲤鱼>长吻鮠.不同器官中,白鱼、鳙鱼、鲤鱼和长吻鮠的肾脏中TBBPA含量最高,其次为肝脏和鳃,腹部和背部组织含量较低,无显著脂肪蓄积效应.白鲢体内肝脏的TBBPA含量最高,肾脏和鳃次之.对白鱼各组织中TBBPA含量与体重间的相关关系分析表明,肝脏、肾脏和鳃中TBBPA浓度随体重的增加而增大,而背部、腹部无显著相关关系.同时测得巢湖水体中TBBPA平均浓度为0.52μg.L-1,计算得到5种鱼的生物浓缩因子为9.56～22.64,表明TBBPA在巢湖鱼体中的浓缩效应不显著.

Tissue distribution and bioconcentration factors of tetrabromobisphenol A(TBBPA) in five economic fishes in Chaohu Lake were measured with SPE-HPLC.The results showed that,the average concentration of TBBPA was 4.70-11.20 ng·g-1(dry weight) in these fishes,in an order as White fish>Silver Carp>Bighead Carp>Common Carp>Longsnout Catfish.The highest concentration of TBBPA was found in the kidney,followed by liver and gill.The concentrations in fat and muscle were very low.Silver carp was really different from the other four fishes with the highest measured level in liver,followed by kidney and gills.In addition,the TBBPA concentration in tissues of the white fish showed positive correlation with the fish weight,especially in liver and kidney,but the trend is not significant in the back and belly tissues.The bioaccumulation factors of TBBPA for the 5 fishes were 9.56-22.64 based on the average concentration of TBBPA in water(0.52 μg·L-1) detected in this study,indicating insignificant bioconcentration effects of TBBPA on five fishes in Chaohu Lake.