04532 IUPAC Gold Book - phase ratio 10.1351/goldbook.P04532 P04532 current quantity 1 The ratio of the quantity of the solvent to that of the other phase. Unless otherwise specified the phase ratio refers to the phase volume ratio. If other aspects of the phase ratio are employed viz. phase mass ratio, phase flow ratio, these should be specified. PAC, 1993, 65, 2373. 'Nomenclature for liquid-liquid distribution (solvent extraction) (IUPAC Recommendations 1993)' on page 2385 (https://doi.org/10.1351/pac199365112373) https://goldbook.iupac.org/terms/view/P04532/html https://goldbook.iupac.org/terms/view/P04532/json https://goldbook.iupac.org/terms/view/P04532/plain Citation: 'phase ratio' 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.P04532 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. 2026-04-18T19:58:01+00:00