Column : Shodex IC SI-91 4C (4.0mmID*100mm) Eluent : 1.8mM Na2CO3 + 1.7mM NaHCO3 aq. Reagent A : 1.5M KBr + 1.0M H2SO4 aq. Reagent B : 1.2mM NaNO2 aq. Flow rate : (Eluent); 1.0mL/min (Reagent A); 0.4mL/min (Reagent B); 0.2mL/min Detector : UV(268nm)