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Type: Artigo de periódico
Title: Characterization Of A New Stationary Phase Based On Microwave Immobilized Polybutadiene On Titanium Oxide-modified Silica.
Author: Morais, Lais S R
Jardim, Isabel C S F
Abstract: Titanium oxide-modified silica was prepared by reaction of silica with titanium tetrabutoxide and then was used as support in the preparation of stationary phases with self-immobilized polybutadiene (PBD) and PBD immobilized through microwave radiation. Chromatographic performance of the stationary phases was evaluated in terms of the efficiency (plates/m), asymmetry (A(s)), retention factor (k) and resolution (R(s)) of two standard sample mixtures, one of then containing the basic compound N,N-dimethylaniline. A microwave irradiation of 30 min at 520 W gave the best efficiency (86,500 N m(-1)), greater than that of a 6-day self immobilized phase (69,500 N m(-1)). Self-immobilized stationary phases prepared with bare silica were also studied for comparison. These resulted in lower chromatographic performance, 43,800 N m(-1), when compared to the self-immobilized phase prepared with titanized silica.
Subject: Butadienes
Silicon Dioxide
Citation: Journal Of Chromatography. A. v. 1073, n. 1-2, p. 127-35, 2005-May.
Rights: fechado
Date Issue: 2005
Appears in Collections:Unicamp - Artigos e Outros Documentos

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