Dissolved Oxygen Measurement by Constant-Potential Derivative Coulometry.

Electroanalysis and Coulometric Analysis

“…Eckfeldt and Shaffer (75) used this technique to determine oxygen (and suggested the term "constant potential derivative coulometry" for the method), employing a flow cell with silver spheres as the working electrode. The obvious advantage of this method of analysis compared to galvanic analyzers with smaller electrodes is that calibration is unnecessary (no unknown calibration terms appear in Equation 2) and the current is independent of changes in temperature, electrode surface, solution viscosity, etc.…”