Chemia Analityczna Volume 46, Number 5 
(September - October 2001)

Separation of Ethoxylated Laurylalcohol Oligomers and Ethoxylated Sorbitane Monoleate Oligomers on Porous Graphitized Carbon Column

by Veronika Nemeth-Kiss, Annamaria Jakab and Esther Forgacs

Institute of Chemistry, Chemical Research Center, Hungarian Academy of Sciences, P. O. Box 17,Budapest, H-1525 Hungary
 

Key words: nonionic surfactants, porous graphitized carbon column, reversed-phase high performance liquid chromatography

The separation of ethoxylated laurylalcohol oligomers and sorbitane monoleate oligomers was investigated by reversed-phase high-performance liquid chromatography on octadecyl silica (ODS) and porous graphitized carbon columns (PGS) with the eluent of a mixture of acetonitrile-water. The selectivity of ODS of column differs from PGC column, because ODS column can separate only according to hydrophobicity, while PGC column is suitable for the separation due to the steric parameters and also the ethylene oxide units of the molecule.


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