Please use this identifier to cite or link to this item:
Type: Artigo de evento
Title: Preparation And Characterization Of A New C18 Urea Phase Based On Titanized Silica
Author: Silva C.R.
Airoldi C.
Collins K.E.
Collins C.H.
Abstract: A new stationary phase containing embedded urea groups (NHC(O)NH) was prepared by a procedure based on the synthesis of a trifunctional C18 urea-alkoxysilane, followed by modification of titanized silica and further endcapping to evaluate if the embedded group would minimize the higher retention and tailing for basic compounds seen with C18 titanized silica phases. Infrared, 13C and 29Si spectroscopies were employed to characterize the C18-urea titanized silica phase. Chromatographic evaluations used hydrophobic, polar and basic compounds to verify the effects of the polar urea groups embedded in the C18 urea phase. The chromatographic parameters, especially for the separation of basic compounds, compare favorably with those obtained on a C18 titanized silica stationary phase, prepared by silanization of titanized silica with octadecyltrimethoxysilane. © 2005 Elsevier B.V. All rights reserved.
Rights: fechado
Identifier DOI: 10.1016/j.chroma.2005.03.113
Date Issue: 2005
Appears in Collections:Unicamp - Artigos e Outros Documentos

Files in This Item:
File Description SizeFormat 
2-s2.0-23044447707.pdf347.02 kBAdobe PDFView/Open

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.