Movement of colloidal particles in an electric field


 * Electrophoresis is a process of separating colloidal particles in a DC electric field. Their different sizes, charges and speeds in the electric field are used. The surface of a colloidal particle has a certain positive potential with respect to its surroundings, which is decisive for its movement.
 * Free electrophoresis – we expose a solution with colloidal particles to the influence of a DC electric field and the particles approach the oppositely charged electrodes at different speeds. However, the separation of particles is not perfect.
 * Electrophoresis on supports - e.g. gel, asbestos, silk, cellulose, starch, paper; more perfect distribution of components