石家庄市售液态牛奶和奶粉中重金属含量的检测及分析

Detection and analysis of heavy metals in liquid milk and milk powder sold in Shijiazhuang city

目的调查石家庄市售牛奶和奶粉中铅、镉、汞和砷等重金属的污染状况。方法采用电感耦合等离子体质谱法对市售不同品牌的牛奶和奶粉中的污染物进行检测,并依据GB2762—2017《食品安全国家标准食品中污染物限量》对牛奶中的铅、镉、汞和砷对公众健康危害风险度进行研究。结果本研究共监测61份样品,铅、镉、汞、砷总合格率为100%。部分食品检出重金属,铅、镉、汞、砷的检出率分别为31.1%、7.69%、0%和0%。结论目前石家庄市市售牛奶中重金属污染总体水平较低,但部分牛奶和奶制品中仍有重金属检出,应引起重视。应采取针对性措施,补充完善相关标准,加强监管力度,以确保牛奶和奶粉的质量安全。

Objective To investigate the pollution of heavy metals such as lead,cadmium,mercury and arsenic in milk and milk powder sold in Shijiazhuang city.Methods The contaminants in milk and milk powder of different brands in the market were detected by inductively coupled plasma-mass spectrometry,and the risk factors of Pb,Cd,Hg and As in milk to public health were also studied according to GB 2762—2017 National food safety standard-Limits of pollutants in food.Results In this study,61 samples were monitored,and the total qualified rate of lead,cadmium,mercury and arsenic was 100%.Heavy metals were detected in some foods,with the detection rates of lead,cadmium,mercury and arsenic being 31.1%,7.69%,0%and 0%,respectively.Conclusion At present,the overall level of heavy metal pollution in milk sold in Shijiazhuang city is low.However,some milk and dairy products still have heavy metal pollution,which should be paid attention to.In order to ensure the quality and safety of milk and milk powder,targeted measures should be taken to supplement and improve relevant standards and strengthen supervision.