伦敦金分析方法研究

Study on Analysis Method of London Gold

通过对伦敦金分析方法的关键影响因素进行条件试验,优化分析方法,建立起一套满足伦敦金检测能力的分析方法。当样品中的金含量99.50%~99.95%时,采用火试金方法,方法加标回收率98.6%~103.0%,相对标准偏差0.0028%~0.0056%,满足伦敦金伦敦金银市场协会考核的要求,但是当样品中的金含量在99.90%~99.95%时,采用基体匹配电感耦合等离子体发射光谱法测定样品中的杂质元素,再用减量法确定样品中金的含量的方法精密度和准确度都更为理想。

A set of analysis method was established for London gold detection according to the condition test of key influencing factors for London gold analysis method,and optimization analysis method.When gold content in sample is 99.50%~99.95%,fire-assay method was adopted to detected the adding standard recovery rate that is 98.6%~103.0%,the relative standard deviation is 0.0028%~0.0056%,it can meet the requirements of London Bullion Market Association,but when the gold content in sample is 99.90%~99.95%,inductively coupled plasma emission spectrometry is adopted to measure impurities in samples,and the weigh-out method is adopted to confirm gold content,the results of method precision and accuracy degree were good.