摘要
建立全自动石墨消解-电感耦合等离子体质谱法同时测定焙烤食品中锡、铝、镉、铅、砷、锰、铜元素含量的检测方法。取焙烤食品样品,用粉碎机粉碎,称取约0.3 g,置于全自动石墨消解仪中进行消解,采用HNO3-H2O2(1∶1)消解溶剂,消解完毕后用电感耦合等离子体质谱法测定,以内标法定量。锡、铝、镉、铅、砷、锰、铜的质量浓度在0.02~10.0μg/L具有较好的线性关系,线性相关系数均大于0.997,样品的方法检出限为0.009~0.038μg/kg,加标回收率为90.8%~105.2%,相对标准偏差均小于5.0%(n=6).。该方法样品处理简单快捷,无污染,测定结果准确,适用于焙烤食品中重金属残留的监测。
The method of automatic microwave digestion-inductively coupled plasma mass spectrometry(ICP-MS)was estiblished for determining tin,aluminum,cadmium,lead,arsenic,manganese and copper in baked food.0.3 g baked samples which had been smashed was tooken and put into automatic graphite digestion instrument for digestion.HNO3-H2O2 solution(1∶1)was selected as the digestion acid system,samples were determined by ICP-MS after digestion,and quantified by internal standard method.The mass concentration of tin,aluminum,cadmium,lead,arsenic,manganese and copper showed good linear relationships in the range of 0.02-10.0μg/L with the corelation coefficients more than 0.997.The detection limits were 0.009-0.038μg/kg,the recoveries of 7 metals were ranged from 90.8%to 105.2%,and the relative standard deviations were all less than 5%(n=6).This method was proved to be simple for sample treatment,little pollution to environment and accurate,which can be used for monitoring heavy metal residues in baked food.
作者
刁春霞
杨华梅
黄为红
乔秋菊
DIAO Chunxia;YANG Huamei;HUANG Weihong;QIAO Qiuju(Taizhou Center for Disease Control and Prevention,Taizhou 225300,China)
出处
《化学分析计量》
CAS
2020年第5期100-103,共4页
Chemical Analysis And Meterage
