泡塑海绵富集-原子吸收分光光度法测定含钨钼的金矿石中的金

Determination of gold in gold ores containing tungsten and molybdenum by atomic absorption spectrometry with foam sponge enrichment

本文主要对泡塑海绵富集-原子吸收分光光度法测定含钨钼的金矿石中的金进行探讨,因在强酸中钨钼形成钨酸、钼酸胶状物包裹金离子,钨酸根、钼酸根与泡塑海绵上的活性基团结合,再次包裹硫脲解脱产物的类胶状物,使结果偏低。实验结果显示,泡塑海绵富集法操作简便,对设备没有特殊要求,一般样品均可采用该方法进行分析。其分析结果的精密度(RSD)小于1.30%,与标准值的相对误差(RE)小于0.95%。

The determination of gold in tungsten-molybdenum-bearing gold ores by atomic absorption spectrometry after enrichment with foamed plastic sponge is discussed in this paper.Tungstic acid and molybdic acid colloidal substances are formed in strong acid to encapsulate gold ions.Tungstic acid and molybdic acid are combined with the active groups on foamed plastic sponge to encapsulate the colloidal substances of thiourea decomposition products again.The result is low.The experimental results show that the foam foam enrichment method is easy to operate and has no special requirements for the equipment.It can be used for analysis of general samples.The precision(RSD)of the analytical result is less than 1.30%,and the relative error(RE)of the standard value is less than 0.95%.