Columns : Shodex Asahipak C8P-50 4E (4.6mmID*250mm) Eluent : 1mM Sodium hydroxide + 0.6% CH3CN Reagent : 1.5M Sodium hydroxide Flow rate : (Eluent); 0.6mL/min, (Reagent); 1.0mL/min Detector : PAD Column temp. : 50℃Y.Kubota et al., Analytical Biochem., 201 (1992) 99.