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有机熔剂萃取技术应用于电感耦合等离子体原子发射光谱法(ICP—AES)具有诱人的前景,成为ICP—AES分析技术的一个重要方面。 本文采用乙酸戊酯[CH_3COO(CH_2)_4-CH_3]作为金的特效萃取剂和络合剂,使金富集并与矿样中大量基体元素分离,将其直接引入ICP光源,测定矿石中微量金。方法操作简便、快速、准确。 方法的实质在于有过量溴水存在时,三价金能从10％盐酸溶液中以氯金酸或溴金酸形式被乙酸戊酯定量萃取,萃取率大于98％。由于溶剂具有特效性,能有效地使金得到富集,重现性好。本法测定金的范围为0.05—100g/T,变动系数为3.02％。
The use of organic solvent extraction technology for inductively coupled plasma atomic emission spectrometry (ICP-AES) has attractive prospects and is an important aspect of ICP-AES analysis technology. In this paper, amyl acetate [CH_3COO (CH_2) _4-CH_3] was used as special gold extractant and complexing agent to enrich the gold and separate a large amount of matrix elements in the ore sample. gold. The method is simple, fast and accurate. The essence of the method is that trivalent gold can be quantitatively extracted from amyl acetate by 10% hydrochloric acid solution in the form of chloroauric acid or brominated acid in the presence of an excessive amount of bromine water, and the extraction rate is more than 98%. Due to the special effects of the solvent, gold can be effectively enriched and reproducible. The method for the determination of gold in the range of 0.05-100g / T, the coefficient of variation of 3.02%.