half-wave potential

The potential of a polarographic or voltammetric @I03006@ at the point, on the rising part of a polarographic or voltammetric wave, where the difference between the total current and the @R05311@ is equal to one-half of the @L03532@. The quarter-wave potential, the three-quarter-wave potential, etc., may be similarly defined.
PAC, 1985, 57, 1491. (Recommended terms, symbols, and definitions for electroanalytical chemistry (Recommendations 1985)) on page 1502 [Terms] [Paper]