以锡作捕集剂，通过调整试金配料，将熔矿温度提高到1100℃，解决了锡试金熔炼困难、不易成扣和扣回收不稳定现象。通过增加助熔剂和覆盖剂，改进了熔渣流动性及样品溢出的问题。对捕集了贵金属的锡扣用盐酸溶解锡、镍等，过滤后王水溶解金、铂、钯沉淀物，并用电感耦合等离子体质谱法测定。对国家标准物质的分析结果与标准值相一致，各元素的RSD在5%~14%之间。对5个地质样品进行结果比对，采用锡试金法与铅试金法前处理测得的金、铂、钯结果相符。该方法在生产实践中已得到了应用，适用于地质样品中金、铂、钯的分析。
The difficulties of tin melting and the button recovery instability were solved by using the trapping agent of tin, adjusting the assay ingredient and increasing the molten ore temperature to 1100℃. Meanwhile, the slag fluidity and the overflow of the sample were improved by adding the flux and covering agent. Tin button with precious metal was dissolved and filtered, then the residue was dissolved with aqua regia and diluted with water. Au, Pt and Pd were determined by ICP-MS. The analysis results were consisted with standard values of the national standard reference materials, and the RSD value was 5%~14%. Au, Pt and Pd in geological samples were determined with tin fire assay method and lead fire assay method respectively, and their results are consistent. This method is suitable for the determination of Au, Pt and Pd in geological samples.
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