{"term":{"id":"04776","title":"potential-determining ions","longtitle":"IUPAC Gold Book - potential-determining ions","doi":"10.1351\/goldbook.P04776","code":"P04776","status":"current","initialism":"<em>initialism<\/em>: p.d.","synonym":"<em>synonym<\/em>: p.d. ions","definitions":[{"id":1,"text":"Those species which by virtue of their electron distribution between the solid and liquid phase (or by their equilibrium with electrons in the solid) determine the difference in Galvani potential between these phases. This definition requires that adsorbed p.d. ions are part of the adsorbent and belong to the category of surface ions.","links":[{"term":"adsorbent","url":"https:\/\/goldbook.iupac.org\/\/terms\/view\/A00153"},{"term":"surface ions","url":"https:\/\/goldbook.iupac.org\/\/terms\/view\/S06180"}],"sources":["PAC, 1991, 63, 895. 'Nomenclature, symbols, definitions and measurements for electrified interfaces in aqueous dispersions of solids (Recommendations 1991)' on page 897 (https:\/\/doi.org\/10.1351\/pac199163060895)"]}],"altoutputs":{"html":"https:\/\/goldbook.iupac.org\/terms\/view\/P04776\/html","xml":"https:\/\/goldbook.iupac.org\/terms\/view\/P04776\/xml","plain":"https:\/\/goldbook.iupac.org\/terms\/view\/P04776\/plain"},"citation":"Citation: 'potential-determining ions' 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.P04776","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":"2026-06-20T08:10:42+00:00"}}