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Type: Artigo de periódico
Title: Preparation Of A New C18 Stationary Phase Containing Embedded Urea Groups For Use In High-performance Liquid Chromatography.
Author: Silva, César Ricardo
Bachmann, Stefan
Schefer, Renata Rabelo
Albert, Klaus
Jardim, Isabel Cristina Sales Fontes
Airoldi, Claudio
Abstract: A new C18 urea stationary phase was prepared by a single-step modification process through the reaction of ProntoSil spherical silica (3 microm, Bischoff) with the trifunctional alkoxysilane (CH3CH2O)3-Si-(CH2)3-NH-C(O)-NH-(CH2)17-CH3, prepared in our laboratory. The phase was characterized by elemental analysis and solid-state 29Si and 13C nuclear mangnetic resonance spectrometry. Chromatographic evaluations of the new phase in 150 x 3.9 mm HPLC columns involving the separation of different test mixtures, indicate good performance for both polar and basic mixtures and also show promising results for further applications.
Subject: Chromatography, High Pressure Liquid
Indicators And Reagents
Magnetic Resonance Spectroscopy
Pharmaceutical Preparations
Silicon Dioxide
Spectrophotometry, Ultraviolet
Rights: fechado
Identifier DOI: 
Date Issue: 2002
Appears in Collections:Unicamp - Artigos e Outros Documentos

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