Polyoxyethylene Lauryl Ether
Polyoxyethylene (4) lauryl ether (Brij
® 30) which is a nonionic surfactant 
was analyzed using Asahipak 
GF-310 HQ ( a multisolvent GPC column ).  
The component of which polyethylene chain is longer elutes faster.

Sample : 1%, 20micro-L
Brij® 30, Polyoxyethylene (4) lauryl ether
Column       : Shodex Asahipak GF-310 HQ (7.5mmID*300mm)
Eluent       : CH3CN/H2O=45/55
Flow rate    : 0.6mL/min
Detector     : Shodex RI
Column temp. : 40deg-C