Electroanalytical Methods:

Although the variety of electrochemical methods may seem to be large, all of them are based on a rather limited number of percepts, the particular combination of which determines the nature of the technique. A general classification of electroanal ytical methods is based on

i) The particular electrical property or properties measured by keeping the other quantities constant and

ii) The mode of mass transport as: diffusion, convection and migration.

Additionally many of there techniques might be divided into two types on the basis of the procedures adopted for the analytical determination:

1. Methods in which little or no chemical transformation occurs and the measurement of an electrical quantity gives a direct measure of concentration, this is sometimes indicated by prefixing 'direct, before the name of the technique (such as direct potentiometery)

2. The second type involves methods based on titration procedures in that the analyte undergoes a stoichiometric chemical transformation affected by an electrochemical reaction, therefore, the end point might or might not be determined electrochemically.  Those methods are named through adding titration after the original name of the technique, like as, amperometric titration potentiometric titration, etc.