transition time

in electroanalytical chemistry
https://doi.org/10.1351/goldbook.T06472
In chronopotentiometry and related techniques, the time that elapses between the instant at which current is applied and the instant at which the concentration of an @E01940@ B at the electrode-solution @I03082@ becomes indistinguishable from zero. In experimental practice the latter time is often taken to be the instant at which the rate of variation of the potential of the @I03006@ attains a maximum value.
Source:
PAC, 1985, 57, 1491. (Recommended terms, symbols, and definitions for electroanalytical chemistry (Recommendations 1985)) on page 1504 [Terms] [Paper]