Title: interstitial water
Long Title: IUPAC Gold Book - interstitial water
DOI: 10.1351/goldbook.14772
Status: current

Definition
Water in sediment or soil that surrounds the solid particles. The amount of interstitial water is calculated and expressed as the percentage ratio of the mass of water in the sediment to the mass of the wet sediment.

Related Term
- soil: https://goldbook.iupac.org//terms/view/15036

Source
- PAC, 2009, 81, 829. 'Glossary of terms used in ecotoxicology (IUPAC Recommendations 2009)' on page 902 (https://doi.org/10.1351/PAC-REC-08-07-09)

Other Outputs
- html: https://goldbook.iupac.org/terms/view/14772/html
- json: https://goldbook.iupac.org/terms/view/14772/json
- xml: https://goldbook.iupac.org/terms/view/14772/xml

Citation: Citation: 'interstitial water' 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.14772
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: 2026-05-18T11:20:58+00:00