河北省动物源性食品中指示性多氯联苯的暴露水平研究

Investigation on exposure levels of indicator polychlorinated biphenyls in animal-derived foods from Hebei Province

目的调查河北省动物源性食品中6种指示性多氯联苯(polychlorinated biphenyls,PCBs)的污染水平。方法2019年在河北省共采集了96份食物样品(包括带鱼、黑鱼、鸡蛋、猪肝、猪肉和牛肉),利用同位素稀释-高分辨气相-高分辨磁质谱法(HRGC-HRMS)测定样品中6种指示性PCBs(PCB 28、PCB 52、PCB 101、PCB 138、PCB 153和PCB180)的含量。结果河北省鱼类样品中指示性PCBs含量(∑6 PCBs)范围为0.12~0.32 ng/g鲜重,其它类样品中∑6 PCBs的含量范围为0.11~1.10 ng/g脂肪。在6类食物样品中,鱼类样品的主要异构体为PCB 138和PCB 153,其它类样品为PCB 28和PCB 52。河北省居民每日膳食摄入量的平均值为0.14 ng/(kg·bw·d),贡献率最高的为带鱼,占61.52%。结论河北省动物源性食品中指示性PCBs的污染水平较低,居民通过膳食摄入指示性PCBs的健康风险较低。

Objective To investigate the pollution levels of six indicator polychlorinated biphenyls(PCBs)in animal-derived foods in Hebei Province.Methods A total of 96 food samples(including beltfish,snakehead,egg,pork liver,pork and beef meat)were collected from Hebei Province in 2019.The contents of six indicator PCBs(PCB 28,PCB 52,PCB 101,PCB 138,PCB 153 and PCB 180)in different food samples were determined using isotope dilution-high resolution gas chromatography-high resolution mass spectrometry(HRGC-HRMS).Results The contents of indicative PCBs in fish samples ranged from 0.12 to 0.32 ng/g fresh weight,while the content of PCBs in other samples ranged from 0.11 to 1.10 ng/g fat.PCB 138 and PCB 153 were the main compounds detected in fish samples,while PCB 28 and PCB 52 were the main compounds detected in other samples.The average estimated daily dietary intake of PCBs for residents in Hebei Province was 0.14 ng/(kg·bw·d),and the highest contribution rate was beltfish(61.52%).Conclusion The pollution levels of indicator PCBs in animal-derived foods in Hebei Province are relatively low,and the residents has lower health risks through dietary intake of indicator PCBs.