火焰原子吸收法同时测定地质样品中金和银

DETERMINATION OF GOLD AND SILVER IN THE GEOLOGICAL SAMPLES BY FLAME ATOMIC ABSORPTION SPECTROMETRY

二氯化锡还原，二氯化汞共沉淀，火焰原了吸收法同时测定地质样品中金和银。对于原矿和尾矿样品，全含量为５．１５μｇ／ｇ，４．４５μｇ／ｇ和０．５４μｇ／ｇ时，相对标准偏差分别为６．２％，３．４％和４．１％。银含量为９．７８μｇ／ｇ，７．６１μｇ／ｇ和１．２２μｇ／ｇ时，相对标准偏差分别为４．４％，３．５％和１２．５％。金的分析结果与参考值基本一致。金和银的回收率分别为８８～１０２％和８５～１００％。方法具有干扰小，分离富集效率高等特点。

A method for the separation of gold and silver using mercury chloride as a precipitator and tin chloride as a reductor was presented. The method can be applied to the determination of gold and silver in primary.mineral and tailings by flame atomic absorption spectrometry. Concentrations of gold and silver in the range 0. 5--5μg/g and 1--10μg/g were determined with relative standard deviations of 3-6% and 4--12%, respectively. The results obtained for gold were in agreement with reference values and the results of gold and silver were accurate and reliable.