NH_3·H_2O与H_2O_2混合液溶解Ag的反应以及Ag与Ag_2S共存时Ag的定量分析

Dissolution of Ag by mixed NH_3·H_2O and H_2O_2 solution and the quantitative analysis of Ag in mixture of Ag and Ag_2S

将 NH_3·H_2O(28%)与 H_2O_2(30%)的溶液以1:1的体积比混合。混合液在室温能迅速地溶解 Ag,但不能溶解 Ag_2S。因此,在 Ag 与 Ag_2S 的混合物中加入 NH_2·H_2O 与 H_2O_2的混合液可将Ag_2S 与 Ag 完全分离。

The solution made by mixing NH_2·H_2O(20%)and H_2O_2(30%)solution in 1:1 volume ratiocan dissolve Ag rapidly,but can scarcely dissolveAg_2S at room temperature.So this solution cancompletely separate Ag_2S from a mixture of Agand Ag_2S.