文章摘要
直接灰吹﹣ICP-AES测定粗铅中的金、银、铂和钯
Determination of gold, silver, platinum and palladium in crude lead by ICP-AES after direct soot blowing
投稿时间:2021-03-11  
DOI:
中文关键词: 分析化学  火试金  粗铅  贵金属  电感耦合等离子体原子发射光谱(ICP-AES)
英文关键词: analytical chemistry  fireassay  crude lead  precious metals  ICP-AES
基金项目:
作者单位E-mail
张俊峰 山东恒邦冶炼股份有限公司山东 烟台264109
中南大学 冶金与环境学院长沙 410083 
zjf498496@126.com 
栾海光 山东恒邦冶炼股份有限公司山东 烟台264109  
王飞虎 山东恒邦冶炼股份有限公司山东 烟台264109  
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中文摘要:
      含有铅、铋、锑、金、银、铂和钯等元素的粗铅采用火试金重量法测定时,不能同时得到铂和钯的含量数据。采用铅箔包裹样品置于灰皿中,于860℃直接灰吹得到贵金属的合粒(含少量铋、铅),合粒可用硝酸溶银,补加过量盐酸溶解金、铂和钯,试液用电感耦合等离子体原子发射光谱仪(ICP-AES)测定其中金、铂、钯和主要杂质元素(铋和铅)的含量,差减可得到银的含量,实现对金、银、铂和钯的同时测定。金、银、铂和钯的测定结果相对标准偏差(RSD)均小于2.95%,加标回收率在98.0%~99.8%之间,满足生产测定的要求。
英文摘要:
      When crude lead containing lead, bismuth, antimony, gold, silver, platinum and palladium is determined by fire assay gravimetric method, the content data of platinum and palladium cannot be obtained at the same time. The sample is wrapped with lead foil and placed in an ash dish. The composite particles of precious metals (containing a small amount of bismuth and lead) are obtained by direct soot blowing at 860 ℃. The composite particles can be dissolved in silver with nitric acid, supplemented with excess hydrochloric acid to dissolve gold, platinum and palladium. The contents of gold, platinum, palladium and main impurity elements (bismuth and lead) in the test solution are measured by inductively coupled plasma atomic emission spectrometry (ICP-AES). The content of silver can be obtained by subtraction. The simultaneous determination of gold, silver, platinum and palladium was realized. The relative standard deviation (RSD) of the determination results of gold, silver, platinum and palladium are less than 2.95%, and the recovery is between 98.0% ~ 99.8%, which meets the requirements of production determination.
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