Title: inner Helmholtz plane Long Title: IUPAC Gold Book - inner Helmholtz plane DOI: 10.1351/goldbook.I03048 Status: current Definition The locus of the electrical centres of specifically adsorbed ions. Related Term - outer Helmholtz plane: https://goldbook.iupac.org//terms/view/O04350 Sources - PAC, 1986, 58, 437. 'Interphases in systems of conducting phases (Recommendations 1985)' on page 448 (https://doi.org/10.1351/pac198658030437) - PAC, 1991, 63, 895. 'Nomenclature, symbols, definitions and measurements for electrified interfaces in aqueous dispersions of solids (Recommendations 1991)' on page 899 (https://doi.org/10.1351/pac199163060895) Other Outputs - html: https://goldbook.iupac.org/terms/view/I03048/html - json: https://goldbook.iupac.org/terms/view/I03048/json - xml: https://goldbook.iupac.org/terms/view/I03048/xml Citation: Citation: 'inner Helmholtz plane' 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.I03048 License: 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. Collection: If you are interested in licensing the Gold Book for commercial use, please contact the IUPAC Executive Director at executivedirector@iupac.org . Disclaimer: 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. Accessed: 2026-07-24T19:15:06+00:00