氢化物发生-原子荧光法测定不同产地牛膝中痕量锑

Determination of Trace Antimony in RADIX ACHYRANTHIS BIDENTATAE from Different Producing Areas by Hydride Generation Atomic Fluorescence Spectrometry

[目的]研究氢化物发生-原子荧光法测定中药牛膝中痕量锑的适宜条件并测定锑的含量。[方法]考察了酸度、硼氢化钾浓度和预还原剂等因素对分析灵敏度的影响。[结果]在最佳测定条件下,锑的检出限为0.05μg/L,线性范围为0.05～100μg/L,相对标准偏差(RSD)为1.36%,加标回收率为93.1%～106.5%,锑含量在0.059～0.772μg/g。[结论]方法具有操作简便、快速、灵敏度高和基体干扰少等特点。

[Objective]To choose appropriate conditions for determining trace antimony in RADIX ACHYRANTHIS BIDENTATAE from different producing areas by hydride generation-atomic fluorescence spectrometry,the content of which was also measured.[Method] Effects of factors such as acidity,concentration of potassium borohydride and pre-reductant on the analytical sensitivity were investigated.[Result] Under the optimum conditions,parameters of antimony were： detection limit of 0.05 ug/L,linear range of 0.05-100 μg/L,relative standard deviation value（RSD） of 1.36%,recovery of 93.1%-106.5% and antimony content of 0.059-0.772 μg/g.[Conclusion] The method was simple and easy to be operated,rapid,high sensitive and less interference.