矿石中金的分析测定

Determination of gold in ores

由于金在矿石中的含量很低,要根据矿样的性质采用不同的预处理、溶样、分离、富集和测定方法。文中研究了金矿样品经高温焙烧后,在稀王水介质中,用甲基异丁基甲酮为萃取剂进行萃取,经硫脲反萃取后,用原子吸收分光光度法测定金;同时,研究了各种测定条件及相关处理方法。经过标准样品加入验证,该方法测定结果令人满意。

As the content of gold in the earth is low, different preconditioning, resolving, enrichment, determination methods should be used according to the properties of ore samples. After the gold ore sample has been roasted under high temperature, extracting agent of methyl butanone extracts the gold. Then the samples were back-extracted by thiourea, and the gold contained in the sample was measured with atomic absorption spectrophotometry. In addition, the determination conditions and treatment methods were studied. Standard sample confirmes that this method is effective.