微波消解-电感耦合等离子体质谱法同时测定大米中5种重金属含量  

Determination of 5 Heavy Metal Elements in Rice by ICP-MS Using Microwave Digestion

作　　者：郭晓宇[1] 王子剑[1] 房宁[1] 王海云[1] 李倩[1] GUO Xiaoyu;WANG Zijian;FANG Ning;WANG Haiyun;LI Qian(Daxing Centre for Disease Control and Prevention,Beijing 102600,China)

机构地区：[1]北京市大兴区疾病预防控制中心,北京102600

出　　处：《食品安全导刊》2023年第9期65-68,共4页China Food Safety Magazine

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大米中铅、镉、汞、砷和铬的分析方法。方法:样品经过微波消解仪消化定容后,采用电感耦合等离子体质谱法同时测定铅、镉、汞、砷、铬含量。结果:铅、镉、砷和铬在1~200μg·L^(-1)、汞在0.05~2.00μg·L^(-1)内线性良好,加标回收率为96.2%~99.0%,相对标准偏差为2.8%~3.9%。结论:本法具有简便、快速、准确、灵敏度及精密度高等优点,适用于大米中铅、镉、汞、砷、铬5种重金属元素的同时测定。Objective:To establish an analytical method for the determination of lead,cadmium,mercury,arsenic and chromium in rice by microwave digestion-inductively coupled plasma mass spectrometry.Method:After the sample was digested and determined by microwave digestion instrument,the content of lead,cadmium,mercury,arsenic and chromium was determined simultaneously by inductively coupled plasma mass spectrometry.Result:The five heavy metals showed good linearity that 1~200μg·L^(-1) for Pb,Cd,As and Cr,and 0.05~2.00μg·L^(-1) for Hg.Spiked recoveries ranged from 96.2%~99.0%.Samples were also analysed in five times parallel experiments,giving the value of the relative standard deviation ranged from 2.8%~3.9%.Conclusion:The method has the advantages of simplicity,speed,accuracy,sensitivity and high precision.It is suitable for the simultaneous determination of five heavy metal elements:lead,cadmium,mercury,arsenic and chromium in rice.

关 键 词：微波消解 电感耦合等离子体质谱法 大米 重金属 

分 类 号：TS210.7[轻工技术与工程—粮食、油脂及植物蛋白工程] O657.63[轻工技术与工程—食品科学与工程]