液相-原子荧光光谱法测定食品中无机砷

[目的]准确测定食品中的无机砷。[方法]采用液相色谱-原子荧光光谱法(LC-AFS)以及砷形态快速分析Princen柱和在线氢化物反应系统对食品中的砷进行检测。[结果]该方法对检测质量浓度为5μg/L的As(III)和As(V)标样,系统具有更高的检测灵敏度,检出限可以分别达0.98和2.88μg/L。该方法在5.0~100.0μg/L范围内的无机砷检测具有良好的线性,相关系数均可为0.999以上,加标量为10μg/L的回收率在95%以上。[结论]该方法是测定食品中无机砷含量的一种高效、低消耗的方法,在实际样品的无机砷检测中也表现出良好的效果,非常适合无机砷的检测。

Determination of Inorganic Arsenic in Food by Liquid Chromatography-Atomic Fluorescence Spectrometry

[Objective] To determine the inorganic arsenic in food accurately.[Method]The liquid chromatography-atomic fluorescence, the fast analytical Princen column and on-line hydride reaction system were employed to determine arsenic in food.[ Result] The detection limits of this method were 0.98 and 2.88 μg/L for 5 μg/L As(III) and As (V) standard samples, respectively showing higher detection sensitivity. The calibration curves of method showed good linearity with linear correlation coefficient 0.999 for both As(III) and As (V) detection in the range of 5.0-100.0 μg/L.The recovery of the method was more than 95%under 10 μg/L.[Conclusion] This method is high efficiency and low consumption for detection of inorganic arsenic, which is suitable for the inorganic arsenic detection.