Phenylalanine nonexchange sorption on low-basicity anionites

Based on an analysis of the characteristics of the adsorptive, sorbent, and a number of other experimental data, a mechanism of phenylalanine nonexcha nge absorption on AN-221, AN-251, and AN-31 low-CD basicity anionites in th e Cl-form was proposed. The mechanism takes into account the electrostatic interaction between the sorbent functional groups and the phenylalanine bip olar ions, the formation and growth or aminoacid associates on the sorbent surface, and the competition between the association processes at the anion ite surface and in the solution.