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贵铅中铅和金的连续测定
- 作者：
- 穆岩|赵亚明|钟英楠|刘金东
- 作者单位：
- 长春黄金研究院有限公司&国家金银及制品质量监督检验中心|吉林大学地球科学学院|长春黄金研究院有限公司&国家金银及制品质量监督检验中心|长春黄金研究院有限公司&国家金银及制品质量监督检验中心
基金项目：
- isnull
详细信息：
- 作者简介：
- 穆岩（1989—），男，吉林长春人，工程师，从事分析检测工作；长春市南湖大路6760号，长春黄金研究院有限公司测试中心，130012；E-mail：muyan0212@qq.com
- 通讯作者：
- isnull
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Continuous determination of lead and gold in precious lead
- English Author：
- Changchun Gold Research Institute Co.,Ltd.&National Quality Supervision and Inspection Center for Gold and Silver Products(Changchun)|College of Earth Sciences，Jilin University|Changchun Gold Research Institute Co.,Ltd.&National Quality Supervision and Inspection Center for Gold and Silver Products(Changchun)|Changchun Gold Research Institute Co.,Ltd.&National Quality Supervision and Inspection Center for Gold and Silver Products(Changchun)
- Unit：
- 摘要
- 在线预览
- 参考文献
摘要:
研究建立了贵铅中铅和金的连续测定方法。样品使用硝酸、溴溶解，加入硫酸形成硫酸铅沉淀，与金及杂质元素分离，乙酸-乙酸铵溶解硫酸铅，Na2EDTA滴定铅量；金和不溶渣灰化-碱溶或灰化-王水溶解后火焰原子吸收光谱法测定金量。本方法测定铅的相对标准偏差为0.12 %，加标回收率为92.10 %～96.42 %；测定金的相对标准偏差为0.20 %～0.52 %，加标回收率为90.20 %～97.20 %，准确度和精密度良好，符合分析测定要求。
关键词:
贵铅；铅；金；连续测定；火焰原子吸收光谱法
Abstract:
The research established the continuous determination method for lead and gold in precious lead.The samples are dissolved with nitric acid and bromine.Lead sulfate precipitation is generated by adding sulfuric acid,sepa-rating lead from gold and impurities.Acetic acid-ammonium acetate dissolves lead sulfate.And lead content is determined by Na2EDTA titration;gold content is determined by flame atomic absorption spectrometry after ashing-alkali dissolution or ashing-aqua regia dissolution.When lead content is determined,the method has a RSD of 0.12 %,the recovery rate of reference materials 92.10 %-96.42 %;when gold content is determined,the RSD is 0.20 %-0.52 %,the recovery rate of reference materials is 90.20 %-97.20 %.The method has good accuracy and precision and is consistent with the requirement of analysis and determination.
Keywords:
precious lead;lead;gold;continuous determination;flame atomic absorption spectrometry
