Term: total velocity of the analyte, \(\nu_{\text{tot}}\)
https://doi.org/10.1351/goldbook.TT06926

Definition:
The sum of electrophoretic velocity, ν ep, of an ion and the electroosmotic velocity, ν eo. \[\nu_{\text{tot}} = \nu_{\text{ep}}\,+\,\nu_{\text{eo}}\] This quantity can be measured experimentally as the effective length of the capillary divided by the migration time (Leff/tm).

Notes:
0) Depending on the signs and relative magnitudes of these velocities, the total velocity of an analyte can have either the same or the opposite direction to the electroosmotic velocity.
1) The total velocity is the velocity of the ion measured as a displacement relative to the capillary wall divided by time.

Related Terms:
1) electrophoretic velocity (http://doi.org/10.1351/goldbook.ET06925).
2) migration time (<em>in capillary electrophoresis</em>) (http://doi.org/10.1351/goldbook.MT06924).

Source: PAC, 2004, 76, 443. 'Terminology for analytical capillary electromigration techniques (IUPAC Recommendations 2003)' on page 449 (https://doi.org/10.1351/pac200476020443)

Citation: 'total velocity of the analyte, \(\nu_{\text{tot}}\)' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. https://doi.org/10.1351/goldbook.TT06926

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.

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.