降低氯化银沉淀对铋吸附的研究  

Study on reducing adsorption of bismuth by AgCl

作　　者：刘雪松 孔祥冰 李合军 山广祺 张喆 刘海彬 李桂华 LIU Xue-song;KONG Xiang-bing;LI He-jun;SHAN Guang-qi;ZHANG Zhe;LIU Hai-bin;LI Gui-hua(Shandong Provincial Key Laboratory of Metrology and Measurement,National Gold&Diamond Testing Center,Jinan 250014,China;Social Justice and Measurement Station of Shandong Province,Jinan 250014,China)

机构地区：[1]山东省计量科学研究院国家黄金钻石制品质量检验检测中心,济南250014 [2]山东省社会公正计量行,济南250014

出　　处：《贵金属》2022年第S01期147-149,共3页Precious Metals

基　　金：山东计量测试学会科技项目(2021KJ10)。

摘　　要：足银样品用硝酸溶解后,直接加入盐酸沉淀分离银基体,用电感耦合等离子体发射光谱法(ICP-OES)测定铋含量,计算加标回收率和相对标准偏差(RSD),发现氯化银沉淀对于铋吸附能力较强,回收率低,达不到检测要求。用盐酸沉淀加入EDTA络合剂和硫氰化钾沉淀去除银基体,都能降低氯化银沉淀对铋的吸附,加标回收率达到85%~99%。The sample was dissolved by nitric acid.Then the silver matrix was separated by hydrochloric acid.The contents of bismuth in sterling silver were determined by inductively coupled plasma atomic emission spectrometry(ICP-OES),calculating recovery rates and relative standard deviation.It was found that the adsorption capacity of silver chloride has strong adsorption capacity for bismuth,unable to meet the requirements of accurate detection.Using hydrochloric acid to add EDTA and potassium thiocyanate to remove silver matrix,can reduce the adsorption of bismuth by AgCl.Recovery is in the range of 85%~99%.

关 键 词：ICP-OES 氯化银 EDTA 硫氰化银 

分 类 号：O657.31[理学—分析化学]