10206 IUPAC Gold Book - chelation solvent extraction 10.1351/goldbook.10206 10206 current 1 Extraction method wherein charged analytes are extracted from an aqueous phase into an organic phase, assisted by a chelating agent. The chelating agent replaces water molecules in the coordination sphere of the metal ions. Consequently, the resultant metal chelates have a hydrophobic character which facilitates their transfer to the organic phase. The analyte(s) are usually metal ions. PAC, 2016, 88, 517. 'Glossary of terms used in extraction (IUPAC Recommendations 2016)' on page 532 (https://doi.org/10.1515/pac-2015-0903) https://goldbook.iupac.org/terms/view/10206/html https://goldbook.iupac.org/terms/view/10206/json https://goldbook.iupac.org/terms/view/10206/plain Citation: 'chelation solvent extraction' 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.10206 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. 2026-06-28T06:48:50+00:00