摘要
目的建立微波消解-电感耦合等离子体质谱法同时测定食品用纸制品中铅、镉、砷、铬、锑、汞6种有害元素的检测方法,了解食品用纸制品中有害元素的污染状况。方法在陕西省10个地市分别采集食品包装用的纸袋、纸盒、纸筒、纸碗、纸杯、纸碟等样品共108份,称取经粉碎样品0.2 g于微波消解罐中,加入6 ml硝酸,2 ml过氧化氢,浸泡过夜,消解赶酸后用电感耦合等离子体质谱仪进行测定,内标法定量,同时测量有证标准物质进行质量控制。结果方法的相对标准偏差(RSD)为2.5%~5.8%,加标回收率为94.7%~116.0%,检出限为0.005 mg/kg~0.050 mg/kg,线性关系良好,相关系数(r)均>0.999。采用本方法对108份实际样品进行测定,结果表明铅、镉、砷、铬、锑、汞的检出率分别为98.1%、85.1%、14.8%、100.0%、8.3%、63.0%。结论该方法样品处理简单,污染损失少,检出限低,准确度和精密度好,适用于食品用纸制品中铅、镉、砷、铬、锑、汞的测定。
Objective To establish a method for the simultaneous determination of lead,cadmium,arsenic,chromium,antimony and mercury in food paper products by microwave digestion inductively coupled plasma mass spectrometry(ICP-MS),and to understand the pollution status of heavy metals in food paper products.Methods A total of 108 samples of paper bag,paper box,paper cylinder,paper bowl,paper cup and paper dish for food packaging were collected in ten cities of Shaanxi Province.0.2 g of the crushed samples were weighed and put into microwave digestion tank.6 ml nitric acid and 2 ml hydrogen peroxide were added and soaked overnight.At the same time,the certified reference materials were measured for quality control.Results The relative standard deviation(RSD)of the method was 2.5%-5.8%,the recoveries were 94.7%-116.0%,the detection limits were 0.005 mg/kg-0.050 mg/kg,the linear relationship was good,and the correlation coefficients(r)were greater than 0.999.The results showed that the detection rates of Pb,Cd,As,Cr,Sb and Hg were 98.1%,85.1%,14.8%,100.0%,8.3% and 63.0%,respectively.Conclusion The method has the advantages of simple sample processing,less pollution loss,low detection limit,good accuracy and precision,and is suitable for the determination of lead,cadmium,arsenic,chromium,antimony and mercury in food paper products.
作者
寇佳
李敏
KOU Jia;LI Min(Physics and Chemistry Laboratory,Xianyang Municipal Center for Disease Control and Prevention,Xianyang,Shaanxi 712000,China)
出处
《中国卫生检验杂志》
CAS
2022年第3期288-290,共3页
Chinese Journal of Health Laboratory Technology
关键词
电感耦合等离子体质谱法
食品用纸制品
微波消解
重金属
Inductively coupled plasma-mass spectrometry
Food paper products
Microwave digestion
Heavy metals
