不同介质AAS法测定银精矿中的银

摘要

According to the property that silver ion can form stable and soluble complex with chloridion, ammonia ion and thiourea, high content silver in silver concentrates is determined with the determination range >5 000 g/t in hydrochloric acid, ammonia and thiourea of different concentrations, and the optimal concentration range of each medium with A AS method is obtained. Silver concentrate sample confirmation and standard substance added standard sample recycling experiment indicate that the analysis results are accurate, reliable and satisfactory for the mineral processing.%根据银离子能与氯离子、氨离子、硫脲结合形成可溶、稳定的络合物,实验了在不同浓度的盐酸介质、氨水介质、硫脲介质中测定银精矿中的高含量银,其测定范围大于5000 g/t,确定了AAS法测定高含量银时各介质的最佳浓度范围.经银精矿样品验证及标准物质加标回收实验表明,分析结果准确、可靠,能满足选冶工艺生产的要求.