Please refer Analysis of Short Amines without Using Ion Pair Reagent to know detail about merit of using polymer based column.
Sample : Atropine (pKa9.9) 300mg/L
Column : Shodex ODP2 HP-4D (4.6mmID*150mm) Eluent : 10mM Sodium phosphate buffer (pH11)/CH3CN=55/45 Flow rate : 1.0mL/min Detector : UV(220nm) Column temp. : 40°C Column : ODS from other manufacturer (4.6mmID*150mm) Eluent : 0.1% Sodium 1-pentanesulfonate aq./CH3CN=55/45 Flow rate : 1.0mL/min Detector : UV(220nm) Column temp. : 40°C