Stochastic modeling of affinity adsorption

A stochastic model is described that allows surface proximity and packing effects to be incorporated into predictions of adsorption kinetics and equil. of affinity adsorption. Equil. predictions show that, depending on conditions chosen, the results obtained for equil. conditions can exhibit either a Freundlich- or a Langmuir-type relationship. Under conditions of surface d. imposed adsorption constraints, the time taken for equil. to be reached increases as the "off" const. is decreased. This suggests that for resins having a high immobilized ligand d. binding kinetics may be more highly limited by the "off" const. than by mass transfer limitations. [on SciFinder (R)]