氢化物发生-原子荧光光谱法测定板栗中微量砷的方法研究

Study on the Determination of Trace Arsenic in Chestnut by Hydride Generation Atomic Fluorescence Spectrometry

摘要:

摘要：本文应用氢化物发生-原子荧光光谱（HG-AFS）法测定板栗中砷的含量。着重对实验最佳条件进行研究，探讨了原子荧光光谱仪的原子化器高度，光电倍增管负高压，载流盐酸浓度和还原剂硼氢化钾浓度对荧光强度的影响，得出了仪器的最佳工作参数。砷标准溶液浓度在0～10 μg·L-1范围内与荧光强度呈线性关系，相关系数为0.999 6，仪器检出限为0.058 0 μg·L-1，样品砷测定结果相对标准偏差RSD=4.12％(n=6)，加标回收率为90.5％～102.3%。该方法具有灵敏度高，操作简单、快速、准确等优点，能够满足板栗中微量砷的分析要求。

Abstract:

Abstracts:Arsenic in chestnut was determined by hydride generation-atomic fluorescence spectrometry in the paper. The effects of atomizer height, photomultiplier negative high voltage, concentration of current carrying hydrochloride and reducing agent of potassium borohydride concentration on florescence were investigated to optimize the experimental conditions.It was found that the concentration of arsenic in the range of 0～10 μg·L-1 was in a good linear relation to the florescence, which resulted in a correlation coeficient of 0.999 6, instrument detection limits of 0.058 0 μg·L-1,RSD of 4.12％(n=6) and a recoveries of 90.5％～102.3％. The method showed that such advantages as high sensitivity, easy and fast operation made the method suitable for the determination of trace arsenic in chestnut.