Column : Shodex AFpak AOV-894 (8.0mmID*50mm) Eluent : (A); 0.1M Sodium acetate buffer(pH7.7) + 0.5M NaCl (B); 0.1M Sodium acetate buffer(pH2.8) + 0.5M NaCl Step gradient: (A) to (B) Flow rate : 1.0mL/min Detector : UV(280nm) Column temp. : Room temp.