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Type: Artigo de periódico
Title: Influence of the TiO2 content on the chromatographic performance and high pH stability of C-18 titanized phases
Author: Silva, CR
Airoldi, C
Collins, KE
Collins, CH
Abstract: To extend pH stability, protective metal oxide layers, such as titanium oxide, that are more stable in alkaline medium, can be chemically bonded to the chromatographic silica surface prior to reaction with silanes. In the present work, the influence of the titanium oxide content on the chromatographic performance was investigated by synthesizing a C-18 phase onto a doubly-titanized silica support and comparing its chromatographic performance with a C-18 phase on singly-titanized silica. The Engelhardt and Tanaka test mixtures were used for chromatographic characterizations using short HPLC columns. The column lifetimes of these titanized phases were also compared by performing accelerated aging tests at 50 degrees C using aggressive phosphate mobile phases at pH 10. (c) 2006 Elsevier B.V. All rights reserved.
Subject: stability
stationary phases
titanized silica
Country: Holanda
Editor: Elsevier Science Bv
Rights: fechado
Identifier DOI: 10.1016/j.chroma.2006.02.025
Date Issue: 2006
Appears in Collections:Unicamp - Artigos e Outros Documentos

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