Title: sedimentation potential difference
Long Title: IUPAC Gold Book - sedimentation potential difference
DOI: 10.1351/goldbook.S05538
Status: current

Definition
The potential difference \(E_{\mathrm{sed}}\) or \(E\) at zero current caused by the sedimentation of particles in the field of gravity or in a centrifuge, between two identical electrodes at different levels (or at different distances from the centre of rotation). \(E\) is positive if the lower (peripheral) electrode is negative. This is also called the Dorn effect.

Related Term
- sedimentation: https://goldbook.iupac.org//terms/view/S05534

Source
- PAC, 1972, 31, 577. 'Manual of Symbols and Terminology for Physicochemical Quantities and Units, Appendix II: Definitions, Terminology and Symbols in Colloid and Surface Chemistry' on page 620 (https://doi.org/10.1351/pac197231040577)

Other Outputs
- html: https://goldbook.iupac.org/terms/view/S05538/html
- json: https://goldbook.iupac.org/terms/view/S05538/json
- xml: https://goldbook.iupac.org/terms/view/S05538/xml

Citation: Citation: 'sedimentation potential difference' 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.S05538
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Accessed: 2026-05-12T03:10:48+00:00