微波消解-ICP-MS同时测定大米中铅·镉和砷
Simultaneous Determination of Pb, Cd and As in Rice by Microwave Digestion-ICP-MS
韩科 1王龙飞 1邱坤艳 1赵恒2
作者信息
- 1. 济源市重金属监测与污染治理重点实验室,河南济源459000
- 2. 河南省环境保护厅,河南郑州450004
- 折叠
摘要
[目的]建立微波消解-ICP-MS同时测定大米中铅、镉、砷的分析方法.[方法]将供试大米样品加入硝酸,经微波消解处理后,用电感耦合等离子质谱仪(ICP-MS)同时分析消解液中铅、镉、砷的含量.[结果]在试验优化条件下,该方法对铅、镉、砷的检出限分别为0.30、0.01、0.06 g/L,选用的国家标准物质的测定值在标准参考值范围内,相对标准偏差在6.0％以内.[结论]该方法简便高效,准确度高,精密度好,适用于大米等农产品中重金属元素铅、镉、砷的分析.
Abstract
[Objective] A method for simultaneous determination of Pb,Cd and As in rice was established by microwave digestion-ICP-MS.[Method] Samples were dissolved by microwave digestion procedure with nitric acid,and contents of Pb,Cd and As in the digestion solutions were determined simultaneously by ICP-MS.[Result] Under the optimized conditions,values of detection limit of the method were as followings:Pb,0.30 μg/L;Cd,0.01 μg/L;As,0.06 μg/L.The determination values of the chosen national standard reference materials were within the certified values.The RSD of the method was less than 6.0％.[Conclusion] The proposed method is convenient and efficient,and it is suitable for the determination of heavy metals Pb,Cd and As in crops such as rice with high accuracy and good precision.
关键词
微波消解/电感藕合等离子质谱法/大米/重金属Key words
Microwave digestion/ICP-MS/Rice/Heavy metals引用本文复制引用
出版年
2016
国家科技期刊平台
NSTL
维普
万方数据