在高氯酸-酒石酸-硫脲介质中原子吸收法测定多种矿石中的银

Determination of Silver in Ores by Atomic Absorption Spectrophotometry

介绍了在HClO4-酒石酸 -硫脲混合介质中原子吸收测定Ag的方法 ,避免了Cu、Sb、W等常见元素对Ag的干扰。方法经MGI系列金银地质标准参考样分析检验 ,结果与标准值相符。应用于含Ag在 1 0 - 3～ 1 0 - 6级的不同矿石中Ag的测定 ,结果与在王水介质中测Ag的结果相符。对含Ag 1 0 - 6水平的试样 9次测定的RSD <5%。

A method for the determination of silver in ores by AAS was developed Perchloric acid tartaric acid thiourea medium was used to prevent interference from coexistent elements such as Cu, Sb, W etc The method has been evaluated by determination of silver in MGI standard samples and has been applied to the determination of silver in the different ores with w (Ag) 10 -3 ～10 -6 The results are in agreement with those provided by AAS with aqua regia medium with precision of <5% RSD( n =9)