典型地区食品中二噁英的污染水平分析

Investigation on the levels of PCDD/Fs in different foods from typical regions

目的评价典型行业所在地区食品样品中17种PCDD/Fs的污染水平。方法使用同位素稀释技术以高分辨气相色谱-高分辨质谱(HRGC-HRMS)测定采自于垃圾焚烧厂、氯化工厂、铸造厂周边以及对照组地区的猪肉、牛肉、鸡肉、牛奶、鸡蛋、水产类及蔬菜样品中的17种二噁英(PCDD/Fs)。结果 OCDD是主要的污染物,平均含量值为0.75 pg/g wet weight;其次,垃圾焚烧厂、氯化工厂、铸造厂周边地区的食品样品中17种PCDD/Fs的毒性当量浓度(TEQ)会显著高于对照组,蔬菜样品中TEQ值会明显低于其他样品;另外,结合已有的食物消费量,计算标准人的二噁英类物质的每月膳食暴露量会远低于JECFA规定的PTMI(70 pg/kg bw/month)。结论垃圾焚烧厂,铸造厂和对照组周边地区人群目前由膳食摄入PCDD/F而导致的潜在健康风险处于较低的水平。

Objective To investigate the levels of 17 polychlorinated dibenzo-p-dioxins and dibenzofurans（PCDD/Fs） in different foods from three typical regions.Methods High resolution gas chromatography-high resolution mass spectrometry（HRCG-HRMS）with isotope dilution was used to monitor contamination levels of PCDD/Fs in different foods（such as pork,beef,chicken,milk,eggs,aquatic product and vegetables） close to incineration plants,chlor-alkali plants,foundry and control area,respectively.Results OCDD was the main contaminant and the mean concentrations were 0.75 pg/g wet weight.The concentrations of PCDD/FsTEQ in food from three typical regions were higher than that of the concentration of the control area,and the levels of PCDD/Fs-TEQ in vegetables were lower than that of other foods.Further more,the average month intake of PCDD/Fs from the consumption of foods were much lower than PTMI of JECFA（70 pg/kg bw/month）.Conclusion It suggests that the general population was at a low health risk for PCDD/Fs caused by the food from incineration plants,foundry and control area.