Controlled potential coulometric:

Controlled potential coulometric methods have been hugely used within the determination of several metal ions. Roughly 55 components in the periodic table have been determined through cathodic reduction of metal ions to the metallic state. More than two dozen metals form amalgams along with mercury, therefore they are determined through controlled potential method using mercury cathode. To know how controlled potential coulometry is used in determination of metal ions, let's consider its common procedure.

General process for performing coulometric determinations at controlled potential of the mercury cathode: