SPECIATION OF ARSENIC IN RICE BY HIGH-PERFORMANCE LIQUID CHROMATOGRAPHY-HYDRIDE GENERATION-ATOMIC FLUORESCENCE SPECTROMETRY WITH MICROWAVE-ASSISTED EXTRACTION

文献类型： 外文期刊

第一作者： Dai, Shouhui

作者： Dai, Shouhui;Wang, Min;Mao, Xuefei;Huang, Yatao;Yang, Hui;Dai, Shouhui;Wang, Min;Mao, Xuefei;Huang, Yatao;Yang, Hui;Wang, Fuhua;Yang, Hui;Wang, Fuhua

作者机构：

关键词： Arsenic speciation;High-performance liquid chromatography-hydride generation-atomic fluorescence spectrometry;HPLC-HG-AFS;Microwave assisted extraction;Rice

期刊名称：ANALYTICAL LETTERS （ 影响因子：2.329； 五年影响因子：1.738 ）

ISSN： 0003-2719

年卷期： 2014 年 47 卷 15 期

页码：

收录情况： SCI

摘要： Arsenic speciation in paddy rice is of considerable interest due to its impact on the food safety and human health. In this study, a simple methodology was developed to simultaneously extract and analyze As species in rice from China. Arsenic species, including arsenite (As(III)), arsenate (As(V)), dimethylarsinic acid (DMA), and monomethylarsonic acid (MMA), were extracted by methanol-water (50: 50, v/v) containing 0.02 mol L-1 nitric acid with a microwave-assisted procedure, and then determined by high performance liquid chromatography-hydride generation-atomic fluorescence spectrometry (HPLC-HG-AFS). The results showed that the method has good efficiency (>90%) for rice, indicating that there were no significant losses or transformations of arsenic during sample treatment and analysis. The limits of quantification (LOQ) of the method were 8.0, 20, 12, and 12 ng g(-1) for As(III), As(V), DMA, and MMA, respectively. When this method was applied to the analysis of rice, As(III) had the highest concentration, followed by DMA, As(V), and MMA. The estimated weekly intake of inorganic As from rice by Chinese people accounted for 11.83% of the provisional tolerable weekly intake. The As speciation results in this study suggest that the risk associated with As in rice to human health may be negligible.

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