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在铂铑金合金中进行常量金的测定,我们采用铈量法,方法基于加入过量硫酸亚铁铵还原金(Ⅲ),再以硫酸铈滴定过量的亚铁。为了使金与基体铂、铑分离,对少量金的乙酸丁酯萃取法作了进一步试验。酸度对金苹取的影响:
The determination of constant gold in a platinum-rhodium alloy was performed using a cerium-based method based on the reduction of gold (III) with an excess of ferrous ammonium sulfate followed by titration of excess ferrous iron with cerium sulfate. In order to separate the gold from the matrix platinum and rhodium, a small amount of gold butyl acetate extraction method was further tested. The effect of acidity on gold extraction: