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Type: Artigo de periódico
Title: Chromatographic And Column Stability At Ph 7 Of A C18 Dimethylurea Polar Stationary Phase.
Author: Silva, César Ricardo
Collins, Carol H
Jardim, Isabel Cristina Sales Fontes
Airoldi, Claudio
Abstract: Chromatographic evaluations of a C18 dimethylurea phase in 150 mm x 3.9 mm HPLC columns were performed using the Tanaka and Engelhardt test mixtures. The applicability of the new C18 dimethylurea phase was also evaluated with a mixture of some herbicides and their metabolites. An artificial aging procedure was also performed by passing a potassium phosphate mobile phase buffered at pH 7.0 through C18 50 mm x 3.9 mm dimethylurea columns. The column stability was evaluated by means of the chromatographic parameters obtained for the separation of some compounds from the Neue test mixture, using apolar, polar and highly basic analytes.
Subject: Chromatography, High Pressure Liquid
Hydrogen-ion Concentration
Methylurea Compounds
Rights: fechado
Identifier DOI: 
Date Issue: 2004
Appears in Collections:Artigos e Materiais de Revistas Científicas - Unicamp

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