Although early voltammetric methods used only two electrodes, a modern voltammeter makes use of a three-electrode potentiostat. The potential of the working electrode is measured relative to a constan...Although early voltammetric methods used only two electrodes, a modern voltammeter makes use of a three-electrode potentiostat. The potential of the working electrode is measured relative to a constant-potential reference electrode that is connected to the working electrode through a high-impedance potentiometer. The auxiliary electrode generally is a platinum wire and the reference electrode usually is a SCE or a Ag/AgCl electrode.
