Title: average rate of flow
Long Title: IUPAC Gold Book - average rate of flow
DOI: 10.1351/goldbook.A00542
Status: current

Definition
The ratio of the mass of a drop, at the instant when it is detached from the tip of the capillary, to the drop time \(t_{1}\); the average value of the instantaneous rate of flow over the entire life of the drop.

Related Terms
- drop time: https://goldbook.iupac.org//terms/view/D01862
- instantaneous rate of flow: https://goldbook.iupac.org//terms/view/I03063

Source
- PAC, 1985, 57, 1491. 'Recommended terms, symbols, and definitions for electroanalytical chemistry (Recommendations 1985)' on page 1503 (https://doi.org/10.1351/pac198557101491)

Other Outputs
- html: https://goldbook.iupac.org/terms/view/A00542/html
- json: https://goldbook.iupac.org/terms/view/A00542/json
- xml: https://goldbook.iupac.org/terms/view/A00542/xml

Citation: Citation: 'average rate of flow' 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.A00542
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: 2026-04-18T11:04:30+00:00