中国部分地区猪肉中指示性多氯联苯污染水平和膳食暴露风险评估

Contamination levels and dietary exposure risk assessment of indicator polychlorinated biphenyls in pork in some regions of China

目的调查中国猪肉中指示性多氯联苯(PCBs)的污染水平以及我国居民膳食暴露情况和风险。方法选取2020年中国13个省(自治区、直辖市)为监测点采集猪肉样品,采用同位素稀释-气相色谱-高分辨磁质谱联用法测定203份猪肉中7种指示性PCBs(PCB28、PCB52、PCB101、PCB118、PCB138、PCB153、PCB180)的含量,并分析其指纹特征。依据各省(自治区、直辖市)猪肉的消费量数据,评估居民通过猪肉暴露指示性PCBs的健康风险。结果猪肉中7种指示性PCBs(∑_(7)PCBs)的平均浓度范围为0.053(广西)~0.826 ng/g脂肪(浙江),P_(95)浓度范围为0.091(广西)~2.702 ng/g脂肪(浙江)。PCB28和PCB52为主要的指纹特征。中国居民通过食用猪肉每日摄入∑_(7)PCBs的平均水平和P_(95)水平分别为(0.062±0.076)ng/kg·BW和(0.158±0.207)ng/kg·BW,暴露风险指数(ERI)均小于1。结论中国猪肉中∑_(7)PCBs的污染水平较低,居民通过猪肉膳食暴露指示性PCBs的健康风险较低。

Objective To investigate the contamination levels of indicator polychlorinated biphenyls(PCBs)in pork in China and the dietary exposure and risks of Chinese residents.Methods The concentration of seven indicator PCBs(PCB 28,PCB 52,PCB 101,PCB 118,PCB 138,PCB 153,and PCB 180)in 203 pork samples from 13 provinces(autonomous regions,centrally administered municipality)in China in 2020 as monitoring sites were analyzed by combined isotope dilution-gas chromatography-high resolution mass spectrometry.The health risk of the population exposure of indicator PCBs through pork was assessed in conjunction with date on pork consumption in each province.Results The mean concentrations of the seven indicator PCBs(Σ_(7)PCBs)in pork ranged from 0.053(Guangxi)to 0.826 ng/g fat(Zhejiang),and P_(95) concentrations ranged from 0.091(Guangxi)to 2.702 ng/g fat(Zhejiang).PCB 28 and PCB 52 were the main fingerprint features.The mean and P_(95) levels ofΣ_(7)PCBs ingested daily by Chinese residents through pork consumption were 0.062±0.076(ng/kg·BW)and 0.158±0.207(ng/kg·BW),respectively,and the exposure risk index(ERI)was less than 1.Conclusion The contamination level ofΣ_(7)PCBs in pork in China,as well as the health risk of residents exposed to indicator PCBs through a pork diet was low.