potentiometry

Potentiometry is an electroanalytical method used in chemical analysis to measure the electric potential (voltage) between two electrodes. This measurement is taken while maintaining a nearly constant, near-zero electric current between the electrodes.12

There are two main types of potentiometry:
* Inert-indicator-electrode potentiometry: This method uses electrodes that are chemically inert. It is often employed to determine the endpoint of oxidation-reduction titrations by monitoring the change in potential as a titrant is added.2
* Ion-selective electrodes: These electrodes are designed to respond preferentially to a specific chemical species in a solution. The potential difference between the ion-selective electrode and a constant reference electrode changes with the concentration of the target ion. A common application is the glass electrode used for pH measurements.1

Potentiometry is a widely used technique in chemical analysis.1