东莞及其邻近海域经济鱼类体内滴滴涕残留特征及风险评价

采用Agilent 7890N型气相色谱仪、毛细管色谱柱（HP-5 30 m×320μm×0.25μm）和ECD检测器测定了东莞及其邻近海域6种经济鱼类体内的滴滴涕（DDTs）残留量。结果显示,鱼类体内残留的w（DDTs）为1.527～24.842μg.kg-1,最高的为凤鲚（Coilia mystus）,其后为尖尾鳗（Uroconger lepturus）和龙头鱼（Harpadon nehereus）;鱼类体内DDTs的4种同分异构体中,w（P,P’-DDE）最高,其后为w（P,P’-DDD）、w（P,P’-DDT）和w（O,P’-DDT）,其所占总量百分比的平均值分别为44.55%、29.19%、22.01%和4.25%;东莞及其邻近海域内应无新的DDTs污染源输入,鱼体内的DDTs可能来自过去的污染,对人体健康不构成威胁。

Residues and risk assessment of dichlorodiphenyl trichloroethanes in commercial fishes from Dongguan and its adjacent waters

We determined the residues of dichlorodiphenyl trichloroethanes（DDTs） in 6 species of commercial fishes from Dongguan and its adjacent waters by Agilent 7890N GC,capillary column（HP-5 30 m×250 μm×0.25 μm） and ECD detector.Results show that the DDTs residues in those fishes are 1.527~24.842 μg · kg-1.Coilia mystus has the highest content of DDTs residues,followed by Uroconger lepturus and Harpadon nehereus.The average content of P,P′-DDE,P,P′-DDD,P,P′-DDT and O,P′-DDT is 44.55%,29.19%,22.01% and 4.25%,respectively.Since no new pollution source of DDTs was found,the DDTs in those fishes might come from the past pollution and pose no significant threat to human health.