Fast and Sensitive Determination of Cadmium and Selenium in Rice by Direct Sampling Electrothermal Vaporization Inductively Coupled Plasma Mass Spectrometry

文献类型： 外文期刊

第一作者： Lan, Guanyu

作者： Lan, Guanyu;Jia, Hongyu;Wang, Zhaohui;Lan, Guanyu;Li, Xue;Jia, Hongyu;Mao, Xuefei;Lan, Guanyu;Yu, Xiaofeng;Yao, Jijun

作者机构：

关键词： cadmium; selenium; electrothermal vaporization; graphite furnace; bypass gas; inductively coupled plasma mass spectrometry

期刊名称：MOLECULES （ 影响因子：4.927； 五年影响因子：5.11 ）

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年卷期： 2022 年 27 卷 23 期

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收录情况： SCI

摘要： In this work, a direct solid sampling device based on modified graphite furnace electrothermal vaporization (GF-ETV) with inductively coupled plasma mass spectrometry (ICP-MS) was established for the simultaneous detection of trace selenium and cadmium in rice samples. A bypass gas was first designed in GF-ETV to improve the device's analytical sensitivity and precision. The ashing and vaporization conditions, the flow rates of the Ar carrier and the bypass gases of ICP-MS were all investigated. Under the optimized conditions, the limits of detection (LODs) for Se and Cd were 0.5 mu g kg(-1) and 0.16 mu g kg(-1), respectively; the relative standard deviations (RSDs) of repeated measurements were within 8% (n = 6). The recoveries of Cd and Se in rice samples were in the range of 89-112% compared with the microwave digestion ICP-MS method, indicating good accuracy and precision for the simultaneous detection of Se and Cd in rice matrix. The whole analysis time is <3 min without the sample digestion process, fulfilling the fast detection of Se and Cd in rice samples to protect food safety.

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