Biamperometry or Dead- Stop End Point Method:
Within amperometry we use one polarized electrode that might be DME or solid electrode or metallic electrode like platinum and the other reference electrode (non-polarized).
In this the potential equivalent to the limiting current plateau is fixed and il is measured as function of reagent volume.
In the present method of biamperometry a pair of identical metallic or solid microelectrodes/polarized electrodes is used. The technique is extremely easy and used for the routine and automatic determination of a single species sample. The instrumental setup which was shown in the figure is the similar as used in amperometry and just SCE is replaced along with platinum electrode within the electrolysis cell and a magnetic stirrer is used. A fixed potential difference of 10-20 mV is applied among the two electrodes through the adjustment of resistance variable potentiometer, R (1000 ohms). In many potential differences one electrode will function as an anode and another cathode. The shape of the titration curves totally depend on the reversibilities of the oxidation-reduction couples at the electrodes of sample and titrant both used. Here we get two kinds of curves for detecting the last point.