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: - 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.
- The total velocity is the velocity of the ion measured as a displacement relative to the capillary wall divided by time.
Source:
PAC, 2004, 76, 443. 'Terminology for analytical capillary electromigration techniques (IUPAC Recommendations 2003)' on page 449 (https://doi.org/10.1351/pac200476020443)