2011. - V. 25. - N 9(125). - P. 67-70
It is offered reagent way of extraction Ag+ and I- from a solution formed after the analysis on CN- argentic titration of industrial electrolytes of cyanide zinc and cadmium plating. In the environment of surplus of solution NH3 solution H2O2 oxidize CN- that result in to destruction of cyanide complexes, thus are simultaneously formed ammine zinc and cadmium complexes. Ammine silver complex at presence I- collapses, as Ag+ react with I- with precipitate AgI, which is insoluble in water solution NH3. Silver precipitates out from deposit AgI action Zn and H2SO4. From the solutions containing I- I2 it is received at addition at first surplus of solution H2SO4, and then necessary quantity of solution H2O2. After filtration of deposit I2, by electrolysis with the insoluble anode at the control рН a solution are taken Zn and Cd.
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