Analysis of four toxic metals in a single rice seed by matrix solid phase dispersion - inductively coupled plasma mass spectrometry
文献类型： 外文期刊
作者： He, Xiufen 1 ; Chen, Lixia 2 ; Chen, Xin 3 ; Yu, Huamei 4 ; Peng, Lixu 3 ; Han, Bingjun 1 ;
作者机构： 1.Chinese Acad Trop Agr Sci, Analysis & Testing Ctr, Hainan Prov Key Lab Qual & Safety Trop Fruits & V, Haikou 571101, Hainan, Peoples R China
2.Qiongtai Teachers Coll, Dept Math, Haikou 571101, Hainan, Peoples R China
3.Chinese Acad Trop Agr Sci, Environm & Plant Protect Inst, Haikou 571101, Hainan, Peoples R China
4.Hainan Univ, Coll Environm & Plant Protect, Haikou 570228, Hainan, Peoples R China
期刊名称：Scientific Reports （ 影响因子：4.379； 五年影响因子：5.133 ）
ISSN： 2045-2322
年卷期： 2016 年 6 卷
页码：
收录情况： SCI
摘要： Toxic metals in rice pose great risks to human health. Metal bioaccumulation in rice grains is a criterion of breeding. Rice breeding requires a sensitive method to determine metal content in single rice grains to assist the variety selection. In the present study, four toxic metals of arsenic (As), cadmium (Cd), chromium (Cr) and lead (Pb) in a single rice grain were determined by a simple and rapid method. The developed method is based on matrix solid phase dispersion using multi-wall carbon nanotubes (MWCNTs) as dispersing agent and analyzed by inductively coupled plasma mass spectrometry. The experimental parameters were systematically investigated. The limits of detection (LOD) were 5.0, 0.6, 10 and 2.1 ng g(-1) for As, Cd, Cr, and Pb, respectively, with relative standard deviations (n = 6) of <7.7%, demonstrating the good sensitivity and precision of the method. The results of 30 real world rice samples analyzed by this method agreed well with those obtained by the standard microwave digestion. The amount of sample required was reduced approximately 100 fold in comparison with the microwave digestion. The method has a high application potential for other sample matrices and elements with high sensitivity and sample throughput.
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