Abstract
A new procedure for separation of free and bound ligand in saturation analysis (e.g., radioimmunoassay, competitive protein binding analysis) is presented. The antibody was immobilized on different carriers (glass rods, aluminium or polyethylene strips) covered with a thin layer of polyglycidyl methacrylate. The surface of the polymer had been activated by reaction with either ethylene diamine and glutaraldehyde or sulfuric acid and sodium periodate. The antibody was immobilized on this activated polymer by a covalent bond. The advantages of the presented separation methods are rapidity, simplicity, and conservation of the free and bound ligand equilibrium. A comparison with other separation techniques is carried out.
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