摘要
Abstract
Composite gold containing platinum,iridium,rhodium,ruthenium and other precious metals is not suitable for the detection of gold content by fire test gold gravimetric method and ICP spectral impurity subtraction method;In order to accurately detect the gold content in this type of sample,by analyzing the properties of this kind of precious metal element,try to establish a detection method suitable for this type of composite gold.Weigh a certain amount of sample,dissolve it in aqua regia,filter,wash and separate the solid insoluble in aqua regia,add excessive hydrazine hydrate to the precious metal solution to reduce the precious metal to element.The obtained precious metals are washed,dried,weighed,and the gold content in the filtrate is collected and measured.The obtained gold powder was obtained by fire test gravimetric method to obtain gold coils containing precious metals,and the gold coils were dissolved in aqua regia,and the precious metal element content in the gold coil was determined on the ICP spectrometer.The gold content in the sample is calculated from the gold standard sample,the gold content in the filtrate,and the content of the precious metal element determined.It has been verified that this method is suitable for the detection of gold content in synthetic gold samples containing platinum,iridium and other precious metals.关键词
合质金/王水溶解/水合肼还原/火试金重量法/测定贵金属含量Key words
synthetic gold/use aqua regia to dissolv/reduction using hydrazine hydrate/fire test gravimetric method/determination of precious metal content分类
矿业与冶金
