云南冶金2026，Vol.55Issue(3)：140-144,5.
铅试金富集-原子吸收光谱法/重量法测定高银粗锡中金和银
Determination of Gold and Silver in High-silver Crude Tin by Lead Fire Assay Enrichment Combined with Atomic Absorption Spectrometry and Gravimetry
摘要
Abstract
An analytical method was established,adopting lead fire assay enrichment.Gold was determined by atomic absorption spectrometry and silver by gravimetry.The results show that under the conditions of sample weight 2.000 g,with 120 g lead tetroxide,10 g borax,40 g sodium carbonate,10 g silicon dioxide and 7.5 g starch after melting and cupellation,the relative standard deviation(RSD,n=7)of gold is 0.67％,and that of silver is 0.31％.The recoveries of gold and silver range from 97.4％to 101.0％and 98.6％to 99.8％respectively.Practical sample test data are consistent with those obtained by potassium iodide potentiometric titration.This method offers reliable support for crude tin refining process control and comprehensive utilization of associated precious metal resources.关键词
高银粗锡/铅试金/原子吸收光谱法/重量法/金/银/富集Key words
high-silver crude tin/lead fire assay/atomic absorption spectrometry/gravimetry/gold/silver/enrichment分类
化学化工引用本文复制引用
王海文,杨海岸,罗伟赋,杨赟金,字富庭,施昱..铅试金富集-原子吸收光谱法/重量法测定高银粗锡中金和银[J].云南冶金,2026,55(3):140-144,5.基金项目
国家自然科学基金项目(52264031) （52264031）
