摘要
铜精矿中常伴生有金、钯、铂等多种贵金属,由于贵金属对贸易结算及冶炼过程均十分重要,因此需对其含量进行准确检测。开发一种利用二氨基硫脲-聚丙烯腈螯合纤维富集分离铜精矿中痕量金、钯、铂的新方法,并结合电感耦合等离子体发射光谱法(ICP-OES)对其进行测定。通过实验优化富集分离条件,确定在10%盐酸介质下,待测离子能被螯合纤维定量吸附,其静态饱和吸附容量分别为Au 275.8 mg/g、Pd 282.2 mg/g、Pt 194.8 mg/g。实验结果表明,方法在Cu^(2+)、Ni^(2+)、Co^(2+)等常见离子存在下不干扰测定,试样测定结果相对标准偏差小于8%,加标回收率在96.5%~100%;采用国家标准物质验证,待测元素测定结果与标准值一致。研究方法为铜精矿中贵金属元素的快速、准确测定提供了新技术手段。
Copper concentrates often contain various precious metals such as gold,palladium,and platinum.Owing to the significance of precious metals in trade settlement and smelting processes,accurate detection of their content is requisite.This article devises a novel method for enriching and separating trace amounts of gold,palladium,and platinum in copper concentrates by employing diaminethiourea polyacrylonitrile chelating fibers and combines it with inductively coupled plasma optical emission spectroscopy(ICP-OES)for determination.The enrichment and separation conditions were optimized through experiments,and it was determined that the tested ions could be quantitatively adsorbed by chelating fibers in a 10%hydrochloric acid medium.The static saturation adsorption capacities were Au 275.8 mg/g,Pd 282.2 mg/g,and Pt 194.8 mg/g,respectively.The experimental results indicate that this method is free from interference in the determination in the presence of common ions such as Cu^(2+),Ni^(2+),Co^(2+),etc.The relative standard deviation of the sample determination results is less than 8%,and the spiked recovery rate is between 96.5%and 100%;Verified using national standard substances,the results of the measured elements are in accordance with the standard values.This study offers a new technological means for the rapid and accurate determination of precious metal elements in copper concentrates.
作者
王崇国
韦犇犇
金小容
刘广龙
汪晓文
WANG Chongguo;WEI Benben;JIN Xiaorong;LIU Guanglong;WANG Xiaowen(Gansu Vocational&Technical College of Nonferrous,Jinchang,Gansu 737100,China;Assay Center of Jinchuan Group Nickel&Cobalt Co.,Ltd.,Jinchang,Gansu 737100,China;Jinchuan Group Nickle and Cobalt Design and Research Institute,Jinchang,Gansu 737100,China)
出处
《中国无机分析化学》
北大核心
2025年第8期1185-1193,共9页
Chinese Journal of Inorganic Analytical Chemistry
基金
甘肃省自然科学基金资助项目(22JR5RC1081)
甘肃省高等学校创新基金资助项目(2022B-519)
金昌市青年人才基金资助项目(2022RC015)。
