摘要
砂金矿中二氧化硅和金的含量较高,用传统的火试金重量法与火焰原子吸收光谱(AAS)法相结合测定砂金矿中的金含量,其结果较为精确。用科学的配料方法,调节好熔渣的硅酸度,得到品质更好的熔渣与铅扣。再通过二次补正收集分散在熔渣中的金,之后进行三次补正收集灰皿中残留的金含量,然后用AAS法测定三次补正得到的金银合粒与分金液中金的含量,从而得到更精确的结果。方法操作简便、适用性广、精密度与准确度较高。通过加标实验得出金的回收率在99.2%~100%,金的相对标准偏差(RSD)在0.24%~0.60%。
The content of silicon dioxide and gold in placer gold is high.In this paper,in order to obtain more accurate results,gold content in placer gold is determined by the combination of traditional fire assay gravimetric method and AAS wet method.Better quality slag and lead button are obtained by using scientific method of proportioning and adjusting the silicic acid degree of slag.Then,the gold dispersed in the slag is collected by secondary correction,and then the residual gold content in the ash dish is collected for three times.Then,the gold content in the gold and silver composite particles and gold separation solution obtained by the three times of correction is determined by atomic absorption spectrometry,so as to obtain more accurate results.This method is easy to operate,wide applicability,high precision and accuracy.The recovery of gold is 99.2%—100%,and the relative standard deviation(RSD)of gold is between 0.24%—0.6%.
作者
崔行宪
石奇超
CUI Xingxian;SHI Qichao(Yanggu Xiangguang Copper Co.,Ltd.,Liaocheng,Shandong 252327,China)
出处
《中国无机分析化学》
CAS
北大核心
2021年第4期45-49,共5页
Chinese Journal of Inorganic Analytical Chemistry
关键词
硅酸度
火试金
二次补正
三次补正
分金液
silicic acid degree
fire assay
secondary correction
three correction
gold separation solution
