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Type: Artigo de evento
Title: High-performance Liquid Chromatographic Stationary Phases Based On Poly(methyloctylsiloxane) Immobilized On Silica I. Physical And Chemical Characterizations
Author: Tonhi E.
Bachmann S.
Albert K.
Jardim I.C.S.F.
Collins K.E.
Collins C.H.
Abstract: Five different reversed-phase materials for high-performance liquid chromatography were obtained by deposition of poly(methyloctylsiloxane) in HPLC silica particles, followed by immobilization using different processes: thermal treatment (120 or 220°C for 4 h), irradiation with microwaves (495 W for 15 min), γ radiation (dose of 80 kGy) and self-immobilization. These phases were characterized by gel permeation chromatography, percent carbon, 13C and 29Si solid-state nuclear magnetic resonance spectroscopy, infrared spectroscopy, thermogravimetric analysis and scanning electron microscopy. The results show that the different immobilization processes produce different physical characteristics in the prepared phases. © 2002 Elsevier Science B.V. All rights reserved.
Rights: fechado
Identifier DOI: 10.1016/S0021-9673(01)01612-0
Date Issue: 2002
Appears in Collections:Unicamp - Artigos e Outros Documentos

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