Electrochemical cells
Potentiometers - Definitions and general principles

In most cases, an electrochemical cell for potentiometric measurement comprises two electrodes immersed in an ionically conductive liquid medium. This may be an aqueous or organic phase to which an electrolyte has been added, or even a naturally ionized liquid medium such as ionic liquids or molten salts. The solute whose concentration is to be measured potentiometrically is dissolved in this liquid medium. The electrodes of the cell are connected to each other by an external electrical circuit which can be connected either to a current generator, or to the...