贵铅中铅和金的连续测定  

Continuous determination of lead and gold in precious lead

作　　者：穆岩 赵亚明 钟英楠 刘金东 Mu Yan;Zhao Yaming;Zhong Yingnan;Liu Jindong(Changchun Gold Research Institute Co.,Ltd.;National Quality Supervision and Inspection Center for Gold and Silver Products(Changchun);College of Earth Sciences,Jilin University)

机构地区：[1]长春黄金研究院有限公司 [2]国家金银及制品质量监督检验中心(长春) [3]吉林大学地球科学学院

出　　处：《黄金》2021年第7期94-96,共3页Gold

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,Na_(2)EDTA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。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 Na_(2)EDTA 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.

关 键 词：贵铅 铅 金 连续测定 火焰原子吸收光谱法 

分 类 号：O657.3[理学—分析化学] TD926.3[理学—化学]