Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/195258
Type: Artigo de periódico
Title: High-performance Liquid Chromatographic Stationary Phases Based On Poly(methyloctylsiloxane) Immobilized On Silica. I. Physical And Chemical Characterizations.
Author: Tonhi, Edivan
Bachmann, Stefan
Albert, Klaus
Jardim, Isabel C S F
Collins, Kenneth E
Collins, Carol 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 degrees C for 4 h), irradiation with microwaves (495 W for 15 min), gamma 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.
Subject: Carbon Isotopes
Chemistry, Physical
Chromatography, Gel
Chromatography, High Pressure Liquid
Isotopes
Magnetic Resonance Spectroscopy
Microscopy, Electron, Scanning
Physicochemical Phenomena
Polymers
Silicon
Silicon Dioxide
Siloxanes
Spectrophotometry, Infrared
Temperature
Thermogravimetry
Rights: fechado
Identifier DOI: 
Address: http://www.ncbi.nlm.nih.gov/pubmed/12831187
Date Issue: 2002
Appears in Collections:Unicamp - Artigos e Outros Documentos

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