ABSTRACT
The motion of charged colloidal particles in an applied electric field, which is called electrophoresis, depends on their zeta potential or electric charge [1-7]. In this chapter we derive equations relating the electrophoretic mobility (the electrophoretic velocity per unit applied electric field) to the zeta potential or electric charges of various types of colloidal particles (hard particles, liquid drops, and soft particles) in a liquid con taining an electrolyte in an applied electric field both for dilute and concentrated suspensions. We deal mainly with static electrophoresis, i.e., electrophoresis of colloi dal particles when a static electric field is applied. We also consider dynamic electro phoresis and other electrokinetic phenomena such as sedimentation potential and conductivity of suspensions of colloidal particles with particular emphasis on an Onsager relationship holding between electrophoretic mobility and sedimentation potential.
