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用活性炭在王水介质中吸附富集金,随后原子吸收测定,作为一种湿法分析法,已广泛应用于各种冶金产品、地质矿样中金的测定。但是以该法测定粗铅中金的公开资料尚不多见。本文以硝酸、酒石酸溶解粗铅试样,在硝酸介质中以活性炭吸附金,过滤后灼烧除炭。再使金以氯金酸形式转入5%盐酸介质中,用原子吸收法测定。以本法分析含金6.9克/吨的试样,单次测定的相对标准偏差为3.4%(n=11);金的可测定范围为0.5—50克/吨,方法简单、快速、具有较高的灵敏度和准确度。
Activated carbon adsorption in aqua regia gold, followed by atomic absorption determination, as a wet analysis method, has been widely used in various metallurgical products, the determination of gold in geological ore samples. However, the method of determination of crude lead in the public information is still rare. In this paper, nitric acid, tartaric acid dissolved crude lead sample, activated carbon in nitric acid medium adsorption of gold, filtered after burning carbon removal. The gold is then transferred to 5% hydrochloric acid in the form of chloroauric acid and determined by atomic absorption spectrometry. The sample with the gold content of 6.9 g / t was analyzed by this method. The relative standard deviation of single measurement was 3.4% (n = 11). The determination range of gold was 0.5-50 g / t. The method was simple and rapid, High sensitivity and accuracy.