Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/89107
Type: Artigo de periódico
Title: Preparation, Characterization And Application Of C8 Type Stationary Phases Modified By Metallic Oxides For Liquid Chromatography [preparação, Caracterização E Aplicaç ão De Fases Estacionárias Tipo C8 Modificadas Por óxidos Metálicos Para Cromatografia Líquida]
Author: Goraieb K.
Bueno M.I.M.S.
Collins C.H.
Collins K.E.
Abstract: This work describes three C8-stationary phases for high performance liquid chromatography based on silica metallized with ZrO2, TiO2 or Al2O3 layers, having poly(methyloctylsiloxane) immobilized onto their surfaces. The stationary phases were characterized using XRF, XAS, FTIR, SEM and elemental analysis to determine the physical characteristics of the oxide and polysiloxane layers formed on the surfaces and chromatographically to evaluate the separation parameters. The results show the changes on the silica surface and allowed proposing a structure for the oxide layer, being observed tetrahedral and octahedral structures, what is completely new in the literature. The formation of a homogeneous layer of metallic oxide (TiO2 and ZrO2) was observed on the silica. The C8-titanized and C8-aluminized stationary phases presented good chromatographic performances, with good values of asymmetry and efficiency. All stationary phase presented few loss of the polymeric layer after the HPLC, indicating that this layer is well attached on the metalized support.
Editor: 
Rights: aberto
Identifier DOI: 10.1590/S0100-40422013000800010
Address: http://www.scopus.com/inward/record.url?eid=2-s2.0-84886302204&partnerID=40&md5=5de078de201d388ccc97e4c22f33772c
Date Issue: 2013
Appears in Collections:Unicamp - Artigos e Outros Documentos

Files in This Item:
File Description SizeFormat 
2-s2.0-84886302204.pdf861.49 kBAdobe PDFView/Open


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