coulometric detection method

in electrochemical analysis
https://doi.org/10.1351/goldbook.C01367
A detection method in which the current is directly proportional to the flow rate of the substance involved in the electrochemical reaction, and the amount of charge which flows is proportional to the amount of substances taking part in the reaction.
Source:
PAC, 1990, 62, 2167. (Glossary of atmospheric chemistry terms (Recommendations 1990)) on page 2186 [Terms] [Paper]