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|Type:||Artigo de evento|
|Title:||Characterization Of A New Stationary Phase Based On Microwave Immobilized Polybutadiene On Titanium Oxide-modified Silica|
|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 (Rs) 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. © 2004 Elsevier B.V. All rights reserved.|
|Appears in Collections:||Unicamp - Artigos e Outros Documentos|
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