Spectrophotometric determination of trace silver in copper concentrate, gold concentrate and tailings after separation and enrichment with ion exchange resin
郭兴家1，姜玉春1，朱继芬1，郝爱军2，高显会3，石雪娇1，王 珊1，张相军1
1.College of Chemistry, Liaoning University, Shenyang 110036, China;
2. College of Pharmacy, Liaoning University, Shenyang 110036, China;
3. School of Public Health Administration, Liaoning Medical University, Jinzhou 121001, China
Abstract：Ｔhe conditions of separation and enrichment of trace silver with 732 type cation exchange resin column have been studied. A method for spectrophotometric determination of silver in copper concentrate, gold concentrate and tailings was proposed. The experiment results indicated that silver could be absorbed by the ion exchange resin in the form of ［Ag(SCN2H4 )3］+ through reacting with thiourea at pH 2-4, and it could be eluted quantitatively with 10 mL of 0.5 mol/L sodium thiosulfate solution，which eliminated the interference from most of coexisting ions. After the separation and enrichment with resin column, the detection limit of thio-michler's ketone spectrophotometry was 5.0 μg/L. When this method was applied to the determination of actual samples, the determination results were consistent with those obtained by flame atomic absorption spectrometry. The relative standard deviations (RSDs, n=5) were not more than 14% and the recoveries were between 96% and 102%.
郭兴家，姜玉春，朱继芬，郝爱军，高显会，石雪娇，王 珊，张相军 . 离子交换树脂分离富集—分光光度法测定铜金精矿及尾矿中银[J]. 冶金分析, 2012, 32(6): 47-51.
郭兴家，姜玉春，朱继芬，郝爱军，高显会，石雪娇，王 珊，张相军 . Spectrophotometric determination of trace silver in copper concentrate, gold concentrate and tailings after separation and enrichment with ion exchange resin. , 2012, 32(6): 47-51.
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