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本文主要报道了用20％磷酸三丁酯—环已烷溶液直接从王水介质中萃取金(Ⅲ)的研究。试验了萃取干扰,确定了萃取金的最佳条件,测定了萃合物的组成及萃取热力学函数,探讨了萃取机理。拟定了塞曼效应石墨炉原子吸收光谱测定痕量金的方法。并应用于提金选冶样品的分析。本法简便,快速,准确经济。灵敏度达到3.5×10~(-11)g/1％吸收。变异系数为2％。
This paper mainly reports the extraction of gold (Ⅲ) directly from aqua regia medium with 20% tributyl phosphate-cyclohexane solution. The extraction interference was tested to determine the optimal conditions for the extraction of gold. The composition of the extraction complex and the extraction thermodynamic function were determined. The extraction mechanism was also discussed. A method for the determination of trace gold by graphite furnace atomic absorption spectrometry with Zeeman effect was developed. And applied to the analysis of gold metallurgy samples. This law is simple, fast, accurate and economical. Sensitivity of 3.5 × 10 ~ (-11) g / 1% absorption. The coefficient of variation is 2%.