【摘要】 采集了江苏、浙江、湖北、河南和重庆不同经济发展水平地区市售鲫鱼样品,利用气相色谱-质谱联用(GC-MS)法分析了鱼肉中12种多氯联苯(Polychlorinated biphenyls,PCBs)的污染水平。结果表明,鲫鱼鱼肉中12种PCBs的总浓度范围是19.78～176.90 ng/g(脂重)。浙江、江苏、湖北、河南、重庆5省(市)PCBs的平均浓度分别为(56.97±9.99)、(117.00±17.16)、(55.84±8.45)、(64.57±11.20)、(84.28±14.77)ng/g(脂重)。PCB118是丰度最大的同系物。对5省(市)居民食用鱼肉时二恶英类PCBs的暴露量估算结果显示,日平均摄入量均低于WHO规定的4 pg WHO-TEQ/kg(体重)的每日耐受摄入量(TDI),是安全的。但如果综合考虑我国居民日常膳食中食用其他蛋白质与脂肪如猪肉、牛肉、牛奶、鸡蛋等时PCBs和其他二恶英类物质的摄入,其健康风险还必须进一步评估。更多还原

【Abstract】 Using gas chromatography/mass spectrometry(GC/MS),the concentration of polychlorinated biphenyls(PCBs) was investigated in crucian carp samples which were collected from the markets of five provinces(or city) in China,including Zhejiang,Jiangsu,Hubei,Henan and Chongqing.The results showed that the concentration of total PCBs ranged from 19.78 to 176.90 ng/g(lipid weight).The average concentration of total PCBs were(117.00±17.16),(84.28±14.77),(64.57±11.20),(56.97±9.99) and(55.84±8.45) ng/g(lipid weight) in crucian carp samples from Jiangshu,Chongqing,Henan,Zhejiang and Hubei,respectively.The PCB118 was a major congener in total 12 PCBs.The results also showed that the estimated TEQs of daily PCBs intakes for residents in these five provinces(or city) were lower than the Tolerable Daily Intake(TDI)(4 pg TEQ/kg body weight a day) which suggested by the World Health Organization(WHO).However,the health risk should be further evaluated since diversity foods were used as the protein and lipid sources for Chinese people,and these foods such as pork,beef,milk and eggs etc.may contain the dioxin-like substances.更多还原