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提出了一种溶剂萃取与原子吸收分光光度法相结合的测定银、铜、铅、硒和阳极泥中金的简单而灵敏的分析方法。样品用盐酸和硝酸分解,金以三辛基甲基铵一溴化金络合物被萃取后,直接雾化,将萃取物喷入火焰中进行原子吸收测定,确定了萃取和测定金的最佳条件,样品中低至0.5微克金也可以测定。对用三辛胺或三辛基甲基氯化(或溴化)铵从盐酸或氢溴酸中萃取金也进行了研究。 为了冶金上的估价,经常需要对银、铜、铅和硒中的金进行测定。这些金属中的金含量很低,因而对于能测定lppm级的分析方法也是必要的。在一般情况下,与予先分离或富集相结合,原子吸收分光光度法对于测定痕量金却是一种很好的分析方法。但是,在测定上述金属中金的报道中,原子吸收分光光度法却很少应用·:Pouock和An—darsonl,Kaumann和Hobart。雨lSen Ku—pta。在用试亚铁灵溶剂萃取或以火试金法从基体中将分出,银以氯化银状态排除后,曾用原子吸收分光光度法测定过铜“。和自然银中的金。 与溶剂萃取相结合的原子吸收分光光度法给金的测定提供了一种简单而灵敏的分析方法。以前的研究指出,用高分子胺或铵盐,如三辛胺‘。一),四丁基过氯酸铵或三辛基甲基氯化胺0“”’从不同介质中萃取金曾做过研究。 本文研究了用三辛铵[TOA],三辛基甲基氯化铵[
A simple and sensitive method for the determination of gold in silver, copper, lead, selenium and anode slime by solvent extraction combined with atomic absorption spectrophotometry was proposed. The sample was decomposed with hydrochloric acid and nitric acid. Gold was extracted with trioctylmethylammonium bromide-gold complex and directly atomized. The extract was sprayed into the flame for atomic absorption spectrometry. The extraction and determination of gold Good conditions, the sample as low as 0.5 micrograms of gold can also be measured. Extraction of gold from hydrochloric acid or hydrobromic acid with ammonium or trioctylmethyl ammonium chloride (or bromide) has also been studied. For metallurgical valuation, it is often necessary to determine the gold in silver, copper, lead and selenium. The gold content in these metals is very low and is therefore also necessary for analytical methods that can determine lppm levels. In general, atomic absorption spectrophotometry is a good analytical method for the determination of trace gold in combination with pre-separation or enrichment. However, atomic absorption spectrometry is seldom used in the determination of gold in metals described above: Pouock and An-darsonl, Kaumann and Hobart. Rain lSen Ku-pta. In the use of ferulic acid solvent extraction or fire test method will be separated from the matrix, the silver chloride state to rule out, had used atomic absorption spectrophotometric determination of copper and natural silver in gold and Solvent extraction combined with atomic absorption spectrophotometry provides a simple and sensitive analytical method for the determination of gold. Previous studies have shown that the use of polymeric amines or ammonium salts, such as trioctylamine ’. A), tetrabutyl Ammonium perchlorate or trioctylmethylamine chloride has been studied in the extraction of gold from different media.In this paper, we studied the effect of ammonium tungstate [TOA], trioctylmethylammonium chloride [