717型阴离子交换树脂分离富集-萃取光度法测定金精矿和尾矿中金  

Determination of gold in gold concentrate and tailing by extraction spectrophotometry after separation and enrichment with 717 anion exchange resin

作　　者：姜玉春[1] 郭兴家[1] 付冰[1] 杨奇[1] 刁鑫[1] 孙野[1] 潘欣彤[1] 

机构地区：[1]辽宁大学化学院,辽宁沈阳110036

出　　处：《冶金分析》2013年第8期59-63,共5页Metallurgical Analysis

基　　金：辽宁省教育厅创新团队项目(LT2012001);沈阳市科技局重点实验室建设专项(130496)

摘　　要：研究了717型阴离子交换树脂柱分离和富集金的条件,建立了光度法测定金精矿和尾矿中金的方法。在10%(体积分数)盐酸介质中,金以AuCl形式被树脂定量吸附后,采用10mL 60g/L的硫脲溶液洗脱吸附在树脂上的金和用过氧化氢破坏洗脱液中过量硫脲,以结晶紫萃取分光光度法测定洗脱液中金。金精矿和尾矿中可能存在的4种阴离子和17种阳离子对金的测定没有干扰。方法的检出限为0.43μg/L,矿样的测定结果与活性碳预富集-原子吸收法相吻合,金精矿和尾矿测定结果的相对标准偏差(n=5)分别为5.4%和7.2%。The separation and enrichment conditions of gold by 717 anion exchange resin were studied. The determination method of gold in gold concentrate and tailing by spectrophotometry was established. In the medium of 10 % （volume fraction） hydrochloric acid, gold was quantitatively adsorbed by resin in form of AuCI. Then, the gold in resin was eluted by 10 mL of 60 g/L thiourea solution. The excessive thiourea in e- lution solution was destroyed by hydrogen peroxide. Finally, the gold in elution solution was determined by extraction spectrophotometry with crystal violet. The coexisting four anions and seventeen cations in gold concentrate and tailing had no interference in the determination of gold. The detection limit of method was 0.43μg/L The determination results of ore samples were consistent with those obtained by atomic absorp- tion method after pre-enrichment by activated carbon. The relative standard deviations （RSDs, n= 5） of de- termining gold in concentrate and tailing were 5.4 % and 7.2 %, respectively.

关 键 词：金 分光光度法 分离富集 阴离子交换树脂 金精矿和尾矿 

分 类 号：O657.32[理学—分析化学]