铋试金﹣二次灰吹﹣ICP-AES测定黑色岩中的铂、钯、金  

Determination of Pt,Pd and Au in black rock by bismuth assay-secondary ash blowing-ICP-AES

作　　者：张帆[1] 王琳[1] 郭家凡[1] 高志军[1] 陈砚[1] 刘勉[1] 龚亮 王菁莹 ZHANG Fan;WANG Lin;GUO Jia-fan;GAO Zhi-jun;CHEN Yan;LIU Mian;GONG Liang;WANG Jing-ying(Key Laboratory of Precious Metals Analysis and Exploration Technology Ministry of Natural Resources,Henan Province Rock&Mineral Testing Centre,Zhengzhou 450012,China;Changchun Sci-Tech University,Changchun 130600,China)

机构地区：[1]河南省岩石矿物测试中心自然资源部贵金属分析与勘查技术重点实验室,郑州450012 [2]长春科技学院,长春130600

出　　处：《贵金属》2022年第2期69-75,共7页Precious Metals

基　　金：豫地矿科研[2020]7号;豫地矿勘查(2021)03号;豫自然资函[2021]157号-4。

摘　　要：黑色岩中的大量碳、硫、镍影响铋试金的捕集和操作。在铋试金配料中加入硝酸钾、铁粉、硝酸银和亚碲酸钾,可消除碳、硫的影响,且一次灰吹时铋扣能快速脱皮、二次灰吹可得到光滑圆整的贵金属碲银合粒。合粒经硝酸、盐酸溶解,电感耦合等离子体光谱法(ICP-AES)测定,铂、钯、金的回收率均大于97%,方法检出限为Pt 0.020μg/g、Pd 0.020μg/g、Au 0.021μg/g。对标准物质测定结果的相对误差(RE)为-4.31%~3.77%,相对标准偏差(RSD)均小于6.92%。Large amounts of carbon,sulfur and nickel in the black rock affect the collection and operation of bismuth assays.Adding potassium nitrate,iron powder and silver nitrate and potassium tellurite can eliminate the influence of carbon and sulfur,and the bismuth buckle can be quickly peeled during the first soot blowing,and the smooth and round silver tellurium particles can be obtained after the second soot blowing.After the bismuth buckle was dissolved in nitric acid and hydrochloric acid,platinum,palladium and gold in solution were determined by ICP-AES,and their recovery rates were more than 97%.The detection limits of Pt,Pd and Auwere 0.020μg/g,0.020μg/g and 0.021μg/g,respectively.The relative error(RE)of the determination results for reference materials is-4.31%~3.77%,and the relative standard deviation(RSD)is all less than 6.92%.

关 键 词：铋试金 贵金属 二次灰吹 黑色岩 碲银合粒 

分 类 号：O652.6[理学—分析化学] O657.31[理学—化学]