硫酸焙烧除铋火试金法测定氯氧铋中金银含量  

Determination of Gold & Silver in Bismuth Oxychloride by Fire Assay Method after Sulfuric Acid Roasting Removal of Bismuth

作　　者：龚昌合 黄巍巍 GONG Chang-he;HUANG Wei-wei(Tongling Non-ferrous Metals Group Technology Center,Tongling 244000,Anhui,China)

机构地区：[1]铜陵有色技术中心

出　　处：《铜业工程》2019年第3期59-62,共4页Copper Engineering

摘　　要：采用硫酸焙烧除去样品中铋,有效克服铋对金银测定的干扰;讨论了应用火试金重量法测定氯氧铋中金、银的含量的条件。实验表明:分析相对标准偏差为1.5%~11.64%,回收率为96.88~103.23%,本方法精密度好、准确度高、操作简单快速。Bismuth in the sample was removed by sulfuric acid roasting to overcome the interference of bismuth on the determination of gold and silver. The conditions for the determination of gold and silver in bismuth oxychloride by fire assay gravimetric method were discussed. The results show that the relative standard deviation is 1.5%~11.64% and the recovery rate is 96.88%~103.23%. The method is of good precision, high accuracy, simple and fast operation.

关 键 词：硫酸焙烧 氯氧铋 除铋 火试金 金银 

分 类 号：TQ075[化学工程]