https://doi.org/10.1351/goldbook.09157
Measuring instrument to obtain the electrical charge passed in an experiment, or to produce a known amount of substance in a titration.
Notes:
- The silver coulometer is a primary reference measurement procedure for charge and current. By weighing the mass of silver deposited in a known time at constant current, the charge and current are calculated from Faraday’s laws of electrolysis.
- Modern instruments for measuring trace water by Karl Fischer titration use the passage of a measured charge to produce iodine from iodide solution. They are known as Karl Fischer coulometers.