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

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

摘要: 采用Agilent 7890N型气相色谱仪、毛细管色谱柱（HP-5 30 m320 m0.25 m）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1.527~24.842 gkg-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。

Abstract: 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 m250 m0.25 m) and ECD detector. Results show that the DDTs residues in those fishes are 1.527~24.842 gkg-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.