Title: substance flow rate
Long Title: IUPAC Gold Book - substance flow rate
DOI: 10.1351/goldbook.S06074
Status: current

Definition
Amount-of-substance of a component crossing a surface divided by the time. For clinical chemistry the term component is recommended. ISO uses "substance".

Related Term
- component: https://goldbook.iupac.org//terms/view/C01209

Source
- PAC, 1996, 68, 957. 'Glossary of terms in quantities and units in Clinical Chemistry (IUPAC-IFCC Recommendations 1996)' on page 994 (https://doi.org/10.1351/pac199668040957)

Other Outputs
- html: https://goldbook.iupac.org/terms/view/S06074/html
- json: https://goldbook.iupac.org/terms/view/S06074/json
- xml: https://goldbook.iupac.org/terms/view/S06074/xml

Citation: Citation: 'substance flow rate' 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.S06074
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.
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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: 2026-06-14T19:00:16+00:00