xmlui.ArtifactBrowser.SimpleSearch.filter.source:Scientific papers of the University of Pardubice. Series A, Faculty of Chemical Technology. 17/2011
ISSN:1211-5541
Abstract:
The separation of samples of ethoxylated nonylphenol type surfactants by twodimensional
method combining liquid chromatography with capillary zone
electrophoresis has been studied. In the first part of the work, separation
conditions using reversed-phase liquid chromatography with isocratic elution were
optimized. Thus six different stationary phases were compared to provide highest
resolution of ethoxylated nonylphenol surfactants with various degrees of
ethoxylation in water/methanol and water/acetonitrile mobile phases. The
separation of nonylphenol branch isomers was carried out using capillary zone
electrophoresis in non-coated and poly(acryl amide) coated capillaries employing
solvofobic interaction approach in background electrolyte containing sodium
dodecyl sulfate and acetonitrile. Finally, nonionic surfactants were analyzed using
combination of optimized methods of liquid chromatography and capillary zone
electrophoresis in off-line automated two-dimensional system.
