In pulse polarography, differential pulse polarography, Kalousek polarography, and related techniques, the duration of an interval during which the excitation signal deviates from the base line. This interval includes the sampling interval.
Source:
PAC, 1985, 57, 1491. 'Recommended terms, symbols, and definitions for electroanalytical chemistry (Recommendations 1985)' on page 1503 (https://doi.org/10.1351/pac198557101491)