Anaphoresis

ANAPHORESIS (from Greek anaphero - I carry upward), the mechanical movement of particles in solutions (their entire molecules) and suspensions toward the anode under the influence of galvanic current. Particles of aqueous mechanical suspensions in a galvanic current field can exhibit anaphoresis provided they absorb negatively charged ions. Colloidal particles, depending on the properties of the given colloid, under certain conditions of absorbing negative ions, also possess anaphoresis; the reaction of the solvent also plays a role; for example, amphoteric colloids (often albuminoids) can have different charges depending on the acidic or alkaline medium and, thus, can exhibit either anaphoresis or cataphoresis. Aqueous solutions of certain salts, for example, nitrates, chlorides, lead acetates, exhibit anaphoresis, which is most clearly observed either when there is a porous partition separating the current poles, or in very narrow (1-2 mm) and hair tubes; the higher the concentration of the solution, the narrower the tube must be. In wide tubes (6-1 mm), anaphoresis of less concentrated solutions can also be observed.