火试金富集－重量法测定吸金树脂中的金

Determination of gold in absorption gold resin by fire assay enrichment-weight method

摘要:

吸金树脂试样经配料、高温熔融后，通过熔铅捕集样品中的金，熔铅冷却后形成铅扣，试料中的其它物质与熔剂形成熔渣．利用铅扣与熔渣的比重差异将其分离，铅扣经高温灰吹后得到银合粒，以稀硝酸溶解银合粒分金，用重量法测定金量．本法测定结果与灼烧灰化－原子吸收光谱法测定结果一致，且操作简单，相对标准偏差小于0．2，，加标回收率大于98，．

Abstract:

The gold was collected from molten lead trapped gold ,through batching and absorption gold res‐in melted by high temperature .After cooling ,lead button extracted from molten was produced ,the other substances and flux are kept in the form of ashes .The lead button trapped gold was separated after high temperature ash blowing differs with weight .These particles containing silver was dissolved into nitric acid and determined by weight method .The results show that burning ash and atomic absorption spec‐trometry test methods are very similar and simplified operation .Standard deviation below 0 .2， ,recovery is greater than 98， .