| When the content of tin in the gold tin alloy is more than 35%, the gold and silver grains are loose and not agglomerated, and there is residual slag in the ash dish, which results in the low result of fire assay. For high content samples, the operation of smelting soot blowing can remove the interference of tin. The complete zygote was obtained. Different concentration of gold and nitric acid should be selected for different samples. Different operation steps were adopted according to different samples. The recovery of gold in gold tin alloy was 99.74%~100.27%, and the precision of the method (RSD) was 0.021%~0.127%. |
