Instrumental Parameters and Wiring

What determines the quality of a potentiostat Obviously, the ideal potentiostat should be fast, of low noise and of high input impedance. These three requirements rarely go together. Often the user has to choose between high speed and high stability . High stability or low noise in voltanunetry is usually achieved in instruments by inserting extra capacitors in the electronic circuit. This solution leads to 

High input impedance ( I x 10 Q) allows the use of electrolyte bridges of high resistance. It may even be possible to fill the bridge with just deionised water. The resistance in the cell leads to ohmic drop in the potential. Fine instru- 

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