Sodium Dodecylbenzenesulfonate (1)

Addition of approximately 50 mM of sodium nitrate or sodium chloride to an eluent and keeping in check effect of the electric charge of the sample make it possible to analyze anionic and cationic surfactants using Asahipak GS-310 7E (a multisolvent GPC column).
GS-310 7E ia an old type of GF-310 HQ.


Sample :
1. Sodium dodecylbenzenesulfonate
2. Glycerin

Column       : Shodex Asahipak GS-310 7E (7.5mmID*250mm)
Eluent       : 50mM NaNO3 aq./CH3CN=40/60 
Flow rate    : 1.0mL/min 
Detector     : Shodex RI 
Column temp. : 30deg-C