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|Type:||Artigo de evento|
|Title:||Preparation Of A New C18 Stationary Phase Containing Embedded Urea Groups For Use In High-performance Liquid Chromatography|
|Abstract:||A new C18 urea stationary phase was prepared by a single-step modification process through the reaction of ProntoSil spherical silica (3 μm, 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 150×3.9 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. © 2002 Elsevier Science B.V. All rights reserved.|
|Appears in Collections:||Unicamp - Artigos e Outros Documentos|
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