PHARMACOLOGY

 EXTRACORPOREAL DIALYSIS ::

Dialysis is based upon the fact that colloidal particles do not diffuse or at the most diffuse very slowly through membrances of parchment cellophane or certain animal tissues while particles of molecular or ionic dimensions diffuse relatively rapidly

 

            Electrodialysis is carried out in a three compartmental vessel with electrodes in the outer compartments containing water and the solution in the central compartment Application of electrical potential cause cations to migrate to the negative electrode compartment and anions to move to the positive electrode compartment in both of which running water finally removes the electrolyte 

        Ultrafiltration is an extension of the usual process of filtration the separation of colloidal particles from those of molecular dimensions found in the true solution 

        Both dialysis and ultrafiltration are very useful tools in the laboratory and studies of the properties of biochemical systems