electrogravimetry

https://doi.org/10.1351/goldbook.09164
Gravimetry in which the material to be weighed is obtained by electrochemical reaction.
Notes:
  1. The electrolysis can be performed by controlling current or electrode potential or, in the simple two-electrode arrangement, controlling the potential difference between the two electrodes.
  2. When the precipitate has a known stoichiometric composition, electrogravimetry is a primary reference measurement procedure not requiring calibration with a standard for a quantity of the same kind (i.e. amount of substance).
Source:
PAC, 2020, 92, 641. 'Terminology of Electrochemical Methods of Analysis (IUPAC Recommendations 2019)' on page 684 (https://doi.org/10.1515/pac-2018-0109)