Electrochemical analytical methods measure the potential associated current in an chemistry cell containing the analyte. These ways are often classified consistent with those aspects of the cell are controlled and is measured. An ion-selective conductor, additionally called a specific ion electrode could be a electrical device that converts the activity of a selected particle dissolved in a solution into an electrical potential. The voltage is theoretically dependent on the logarithm ionic activity, consistent with the Nernst equation. Ion-selective electrodes square measure employed in analytical chemistry and biochemical/biophysical analysis, wherever measurements of ionic concentration in aqueous solution measure needed. Coulometry is that the name given to a group of techniques in analytical chemistry that verify the sum of matter throughout an electrolysis reaction by measurement the amount of electricity consumed or made. Potentiostatic coulometry could be a technique most referred as "bulk electrolysis". The working electrode is kept at a constant potential and the current that flows through the circuit is measured. This constant potential is applied long enough to completely or oxidize all of the electroactive species in a given solution. because the electroactive molecules are consumed, the current decreases, approaching zero once the conversion is complete. Voltammetry information about an analyte is obtained by measuring the current as the potential is varied processes.