Amperometric titration:

A number of amperometric titrations can be carried out at dilutions (ca 10^-4 M) at which many visual or potentiometric titrations no longer yield accurate results. The output of the titration are independent of the characteristics of the capillary. So amperometric titration is capable of greater accuracy than non- titrative polarographic method.

Mercury cannot be used as electrode at positive potentials since of its oxidation and thus rotating platinum electrode at 600 revolutions per minute is used. Along With platinum as electrode the attainment of steady state diffusion current is slow and one has to wait considerable time after every addition of the reagent and therefore Pt electrode is rotated.