青岛及崇明岛食用鱼和鸭中共平面多氯联苯与多氯萘的研究

Studies on Coplanar-PCBs and PCNs in Edible Fish and Duck in Qingdao and Chongming Island

利用HRGC-HRMS测定了青岛海鱼和上海崇明岛淡水鱼、鸭样品中共平面多氯联苯（co-PCBs）和多氯萘（PCNs）（均以脂肪计）的质量分数,并根据每日摄取量可能带来的健康风险进行了初步探讨.青岛海鱼中w（co-PCBs）和w（PCNs）平均值约为4041和225 pg/g,崇明岛淡水鱼约为3318和640 pg/g.崇明岛鸭肉中w（co-PCBs）和w（PCNs）平均值分别约为966和43.8pg/g.青岛海鱼中PCNs同系物组成（以5-CNs和3-CNs为主）与崇明岛淡水鱼完全不同.与国内外其他地区鱼和家禽相比,其污染物含量均较低.所有样品中co-PCBs的毒性当量浓度（WHO-TEQ）为0.68-11.40 pg/g,PCNs的毒性当量浓度（WHO-TEQ）为0.001-0.210 pg/g.根据当地人群的饮食习惯,两地人群co-PCBs和PCNs每日摄入量远低于WHO对普通人群规定的每日容许摄入量,因此不会对人群健康产生严重的负面效应.

Nine pooled samples, belonging to two food categories （fish and duck）, were collected in 2006 from coastal waters of Qingdao and Chongming Island of Shanghai. Concentrations of co-planar polychlorinated biphenyls （co-PCBs） and polychlorinated naphthalenes （PCNs） were measured by HRGC-HRMS, and potential health risks for consumption of fish and duck were preliminarily discussed. In fish, the mean concentrations of co-PCBs and PCNs respectively were about 4,041 and 225 pg/g lipid from Qingdao, and 3,318 and 640 pg/g lipid from Chongming Island; in duck meat, the mean concentrations were about 966 and 43.8 pg/g lipid, respectively. The homologue profiles of PCNs in fish from Qingdao and Chongming Island were quite different. The total co-PCB-TEQ （toxicity equivalence） and PCN-TEQ ranged from 0.68 to 11.40 pg（WHO-TEQ）/g lipid and from 0.001 to 0.210 pg（WHO-TEQ）/g lipid for fish and duck meat, respectively. Based on the food consumption patterns of the local populations, the average daily intake of dioxin-like compounds from the consumption of fish and duck was estimated to be less than the tolerable daily intake （TDI）, 1-4 pg（WHO-TEQ）/kg body weight, suggesting low health risk for the local populations.