Column : Shodex RSpak DS-613 (6.0mmID*150mm) Eluent : [0.5M Na2SO4 + 0.05M Na2HPO4 + 0.05M NaOH](pH12.0) + 15% CH3OH Flow rate : 1.0mL/min Detector : Shodex RI Column temp. : 40℃