Title: hold-up time
Long Title: IUPAC Gold Book - hold-up time
DOI: 10.1351/goldbook.10038
Status: current

Definition
Time required to elute a component which is not retained by the stationary phase.

Notes
1) The hold-up time includes any time that the component spends in the sample injector, the detector, and connectors.
2) The hold-up time is related to the hold-up volume (\(V_{\rm{M}}\)) and flow rate (\(F_{\rm{c}}\)) by \(t_{\rm{M}} = V_{\rm{M}}⁄F_{\rm{c}}\) .

Source
- PAC, 2017, 90, 181. 'Terminology of separation methods (IUPAC Recommendations 2017)' on page 196 (https://doi.org/10.1515/pac-2017-0111)

Other Outputs
- html: https://goldbook.iupac.org/terms/view/10038/html
- json: https://goldbook.iupac.org/terms/view/10038/json
- xml: https://goldbook.iupac.org/terms/view/10038/xml

Citation: Citation: 'hold-up time' 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.10038
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Accessed: 2026-05-18T06:29:02+00:00