02722 IUPAC Gold Book - half-wave potential 10.1351/goldbook.H02722 H02722 current 1 The potential of a polarographic or voltammetric indicator electrode at the point, on the rising part of a polarographic or voltammetric wave, where the difference between the total current and the residual current is equal to one-half of the limiting current. The quarter-wave potential, the three-quarter-wave potential, etc., may be similarly defined. indicator electrode https://goldbook.iupac.org//terms/view/I03006 limiting current https://goldbook.iupac.org//terms/view/L03532 residual current https://goldbook.iupac.org//terms/view/R05311 PAC, 1985, 57, 1491. 'Recommended terms, symbols, and definitions for electroanalytical chemistry (Recommendations 1985)' on page 1502 (https://doi.org/10.1351/pac198557101491) https://goldbook.iupac.org/terms/view/H02722/html https://goldbook.iupac.org/terms/view/H02722/json https://goldbook.iupac.org/terms/view/H02722/plain Citation: 'half-wave potential' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. 10.1351/goldbook.H02722 The IUPAC Gold Book is licensed under Creative Commons Attribution-ShareAlike CC BY-SA 4.0 International (https://creativecommons.org/licenses/by-sa/4.0/) for individual terms. If you are interested in licensing the Gold Book for commercial use, please contact the IUPAC Executive Director at executivedirector@iupac.org . The International Union of Pure and Applied Chemistry (IUPAC) is continuously reviewing and, where needed, updating terms in the Compendium of Chemical Terminology (the IUPAC Gold Book). Users of these terms are encouraged to include the version of a term with its use and to check regularly for updates to term definitions that you are using. 2026-06-10T14:22:08+00:00