Measurement principle in which the complex electric impedance of a system is measured, usually as a function of a small amplitude sinusoidal electrode potential.
See: electrochemical impedance spectroscopy
Source:
PAC, 2020, 92, 641. 'Terminology of Electrochemical Methods of Analysis (IUPAC Recommendations 2019)' on page 686 (https://doi.org/10.1515/pac-2018-0109)