Cyclic Voltammetry is a commonly used technique to clarify processes occurring at electrochemical electrodes. At this, the current, flowing via the working electrode(W) into the cell, is monitored as a function of the voltage drop between W and the reference electrode(R). The applied voltage is repeatedly swept linearly between two maximum values. The voltage applied to the counter electrode(C) is used as the manipulated variable in this control loop.
The experimental system developed at our institute, combines the voltage control loop and the current measurement with the computer interface in one device, see figure below. The analog circuits, optimized for the respective application, are contained in slot modules, to ensure high flexibility. Showing a current amplification factor of 106 V/A in the recent system, allows to measure currents down to the pA-regime.
