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| 沉淀方式对ICP-AES法测定纯银中铅和镉的影响 |
| The Effects of Precipitation Method on Determination of Pb and Cd by ICP-AES in Pure Silver |
| Received:August 24, 2017 |
| DOI： |
| 中文关键词: 分析化学 银 杂质元素 氯化银 硫氰化银 |
| 英文关键词: analytical chemistry silver impurities silver chloride silver thiocyanate |
| 基金项目:山东省质量技术监督局科研项目(2016KY05)。 |
| Author Name | Affiliation | E-mail | | LIU Xuesong | National Gold & Diamond Testing Center, Shandong Institute of Metrology, Jinan 250014, China | lxs_198618@163.com | | KONG Xiangbing | National Gold & Diamond Testing Center, Shandong Institute of Metrology, Jinan 250014, China
Social Justice and Measurement Station of Shandong Province, Jinan 250014, China | | | LI Guihua | National Gold & Diamond Testing Center, Shandong Institute of Metrology, Jinan 250014, China | | | HUANG Zhun | National Gold & Diamond Testing Center, Shandong Institute of Metrology, Jinan 250014, China | | | WANG Ping | National Gold & Diamond Testing Center, Shandong Institute of Metrology, Jinan 250014, China
Social Justice and Measurement Station of Shandong Province, Jinan 250014, China | | | ZHANG Fengxia | National Gold & Diamond Testing Center, Shandong Institute of Metrology, Jinan 250014, China
Social Justice and Measurement Station of Shandong Province, Jinan 250014, China | |
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| 中文摘要: |
| 用硝酸溶解纯银样品，分别加入盐酸和硫氰化钾沉淀分离银基体，用电感耦合等离子体原子发射光谱(ICP-AES)测定试液中的铜、锌、铬、铅和镉。结果表明，采用氯化银沉淀，铅和镉会被吸附，回收率和相对标准偏差(RSD)不能满足测定要求；采用硫氰化银沉淀可以避免对铅和镉的吸附，满足测定要求。 |
| 英文摘要: |
| The silver sample was dissolved in nitric acid, and then separated the dissolved silver matrix by either hydrochloric acid or potassium thiocyanate precipitation methods. The concentrations of copper, zinc, chromium, lead and cadmium in sterling silver were determined by inductively coupled plasma atomic emission spectrometry (ICP-AES). The results showed that lead and cadmium were adsorbed by AgCl for the HCl precipitation method, and that its recovery and relative standard deviation (RSD) did not meet the determination requirements. However, the AgSCN precipitation method meets the requirements of determination in that there was no adsorption of lead and cadmium by silver thiocyanate. |
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