potentiometric detection method

in electrochemical analysis
https://doi.org/10.1351/goldbook.P04790
A detection method in which the potential of a cell is related to the concentration (activity) of a reactant which is a component of the cell fluid.
Source:
PAC, 1990, 62, 2167. (Glossary of atmospheric chemistry terms (Recommendations 1990)) on page 2186 [Terms] [Paper]