氢化物发生-原子荧光法测定痕量硒

The Determination of Trace Selenium in Samples by Hydride Generation─Atomic Fluorescence Spectrometry

研究了氢化物发生 -原子荧光法在生物、农业、环境等样品中硒含量测定上的应用 ,考察了HCl介质浓度、HCl载流浓度、KBH4浓度、仪器工作参数、共存元素等条件的影响 ,确定了最佳测定条件。方法的检出限 0 .32 μg/L ,相对标准偏差小于 0 .4 % ,回收率为 93%～ 10 2 %。

In this thesis, a method was developed for the determination of trace selenium in biological, agricultural and environmental samples by hydride generation ─ atomic fluorescence spectrometry. The factors that affected the determination of selenium such as the concentration of HCl, KBH 4, the instrument parameters and coexistent elements were optimized. Under the optimum conditions, the detection limits of the method was 0.32 μg/L, the relative standard deviation was less than 0.4 %, the recovery rate of samples were ranged from 93 % to 102 %.