氢化物原子吸收与常规雾化火焰原子吸收法测定锑的几个问题

The Problems on the Determination of Sb by Hydride Generation and Normal Nebulization Flame Atomic Absorption

本文就氢化物原子吸收法与常规雾化火焰原子吸收法用于锑含量的测定中所存在的共存元素的干扰,"记忆效应"及锑的价态变化等几个方面的问题进行了试验考察和分析,对两种方法的灵敏度、精密度及测定线性范围进行了比较,结果表明:氢化物原子吸收法的最大优点是灵敏度高(可达pp～b级)能满足含有微量锑试样的分析要求。雾化火焰原子吸收法测定锑,由于不存在"记忆"效应,样品之间的更换瞬间即可完成,因而适宜大量样品的检测分析。

The interferences of coexistence elements, remembrance effect, and change of Sb atomic valence etc., which exist in the determination of Sb with hydride generation and normal nebulization flame atomic absorption spectrophotometry have been tested and reviewed. The sensitivity, precision and determination linear range of the two methods have been compared. The results of the experiment demonstrate that main advantage of hydride genera- tion flame atomic absorption Spectrophotometry is high sensitivity (ppb), which can meet the demand of the analysis of trace Sb-contained samples. The normal nebulization flame absorption method is used to test and analysising many samples without remembrance effect and samples can be exchanged instantaneously.