三正辛胺棉富集分离原子吸收光谱法测定金

Determination of Gold by Flame Atomic Absorption Spectrophotometry after Enrichment and Separation with Tri-n-Octyl Amine Cotton

论述了三正辛胺棉的制备及吸附金的条件和解脱方法。采用火焰原子吸收法进行测定。方法的测定范围为 0 .2— 4 0 g/ t,相对标准偏差为 2 .3%。将该法用于测定黄铜矿中的金 ,其结果与传统的泡沫塑料富集 -硫脲解脱原子吸收法测定结果一致 ,而本法分离效果好 ,测定速度快 ,操作简便。

The preparation of tri-n-octyl amine cotton and the condition of its adsorption of gold as well as gold desorption method are described.The FAAS method is employed for gold determination.The determination range of this method is 0.5-40g/t.Its RSD is 2.3%.The method has been applied to the determination of gold in chalcopyrite,and its result agreed with that of the traditional polyurethane from enrichment method.This method is quick and simple with good separation effect.