ANALYTICAL BEHAVIOR OF HYDROPHILIC GLYCOLMETHACRYLATE GELS WITH BOUND THIOL-GROUPS

Hydrophilic glycolmethacrylate gels with side chains containing thiol groups show high sorption selectivity for Hg, Sb, Bi, As, Ag, Cu and Pt, even in 1-3 M solutions of sulfuric or hydrochloric acid. The preparation of the sorbent Spheron Thiol and the distribution coefficients for 13 ions as a function of pH are described; within the optimal pH range the distribution coefficients exceed 104. The sorption capacity of the resin reached ca. 0.5-1.0 mmol Hg g-1 in 0.05 M HCl and equilibrium was achieved within 5 min, except for arsenic and platinum in insufficiently acidic solutions. © 1979.