Mass transport electrophoresis: An improved apparatus

A mass-transport electrophoresis apparatus is proposed by which high stability with time of the impressed current is achieved. This is obtained by introducing a salt bridge between the inner electrode compartment and the chamber where enrichment of the colloid occurs. This disposition allows the use of concentrated solutions of electrolytes in which reversible behavior of the employed electrodes is easily obtained; in the mean time, it is possible to avoid both the growth of films at the electrode surface and the electrical transport of the ions produced by the electrode reaction into the colloidal suspension, thus preventing possible coagulation phenomena of the colloid. © 1978.