Zeta potential is related to the electrophoretic mobility by the HENRY F(ka) EQUATION
3 h | ||
| UE = electrophoretic mobility | ||
| z = zeta potential | ||
| e = dielectric constant | ||
| h = viscosity | ||
| f(k a) = Henrys function |
- The units of k are reciprocal length and 1/k=”thickness” of the electrical double layer (the Debye length)
- a = the particle radius
- ka = the ratio of particle radius to double layer thickness
- For particles in polar media the maximum value of F(ka) is 1.5 (Smoluchowski approximation)
- For particles in non-polar media the minimum value of F(ka) is 1 (Hückel approximation)
