Column : Shodex IC NI-424 (4.6mmID*100mm) Eluent : 8mM 4-Hydroxybenzoic acid + 2.8mM Bis-Tris + 2mM Phenylboronic acid + 0.005mM *CyDTA Flow rate : 1.0mL/min Detector : Non-suppressed conductivity Column temp. : 40deg-C* CyDTA: trans-1,2-Diaminocyclohexane-N,N,N',N'-tetraacetic acid