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投稿时间：2015-03-20
投稿时间：2015-03-20
中文摘要: 建立了电感耦合等离子体质谱法（ICP-MS）测定富硒大米中Pb、As、Cd、Hg、Cr含量的方法，样品经微波消解后，直接用ICP-MS同时测定上述5种元素。结果显示，5种元素的检出限在0.009 μg/L～0.038 μg/L之间，标准曲线线性相关系数均大于0.999 5，方法精密度RSD＜5.7%，加标回收率在76.5%～108.1%之间，同时，用大米国家标准物质GBW 10010对方法的准确性进行了确认。本文用建立的方法对富硒大米中铬、铅、镉、汞、砷的含量进行了测定，并对富硒大米的重金属残留作了初步调查。
Abstract:The method for determination of Pb，As，Cd，Hg and Cr in selenium-enriched rice by microwave digestion inductively coupled plasma spectrometry（ICP-MS）was developed.The samples were pretreated by microwave digestion，and then detected by ICP-MS.For all elements，the correlation coefficient of the calibration curves were over 0.999 5；the detection limits were in the range of 0.009 μg/L-0.038 μg/L；the relative stan-dard deviations were less than 5.7%；the recoveries were in the range of 76.5%-108.1%.Mean-while，the rice national standard reference material（GBW 10010）was monitored to verify the accuracy and precision of the method.The 5 elements in the samples were detected by the proposed method，and a preliminary investigation was carried out for the heavy metal residues in the selenium-enriched rice.
keywords: selenium-enriched rice heavy metal residues ICP-MS
文章编号：201610037 中图分类号： 文献标志码：
基金项目:科技部国家重大科学仪器设备开发专项子项目“国产ICP-MS在食品质量安全领域的应用研究”（2011YQ060100）
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