Accurate determination of arsenic and selenium in plant food samples by using ICP-MS/MS

文献类型： 外文期刊

第一作者： Hu, Xianqiao

作者： Hu, Xianqiao;Cao, Zhaoyun;Sun, Weihua;Yang, Huan;Xu, Ping;Zhu, Zhiwei;Hu, Xianqiao;Cao, Zhaoyun;Sun, Weihua;Yang, Huan;Xu, Ping;Zhu, Zhiwei

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期刊名称：ANALYTICAL METHODS （ 影响因子：2.896； 五年影响因子：2.716 ）

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收录情况： SCI

摘要： Arsenic (As) and selenium (Se) in food have caused public concern. Determination of As and Se in plant food samples encounters mass spectral interferences. The influence of polyatomic and doubly charged ions on the determination was evaluated by monitoring As-75, Se-77, Se-78, Se-80, and Se-82 in four modes. The result showed that serious interferences were observed by using "no gas" mode (octopole vented, single quadrupole mode). Most but not all interferences could be removed when using He mode (He used as the collision gas, single quadrupole mode) or H-2 mode (H-2 used as the reaction gas, MS/MS mode), while O-2 mass-shift mode (O-2 used as the reaction gas, MS/MS mode) enabled the effective removal of all interferences. In the O-2 mass-shift mode configuration, the ions of interest were filtered twice by using the mass-to-charge ratio, enabling the removal of all interfering species. As and Se concentrations could be determined interference-free by using mass-shift mode with O-2 as reaction gas. The performance of O-2 mass-shift mode was investigated for the determination of As and Se in five plant reference materials. The obtained results were consistent with the certified values, indicating that the O-2 mass-shift mode was an effective method to determine As and Se in plant food samples. The detection limits of the method for As-75, Se-77, Se-78, Se-80, and Se-82 were 0.5, 0.7, 1.1, 0.3 and 0.6 ng g(-1), respectively.

分类号： O65

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