Capillary monolithic columns based on poly(styrene-divinylbenzene-methacrylic acid) copolymer for liquid chromatography and electrochromatography
Abstract
This work deals with newly developed poly(styrene-divinylbenzene-methacrylic acid) monolithic columns for capillary electrochromatographic and capillary liquid chromatographic separations of low-molecular-weight organic compounds. The influence of the polymerization time on chromatographic properties of prepared monolithic capillary columns was studied by capillary electrochromatography and capillary liquid chromatography using a model mixture of thiourea, benzene, and its homologues.
The effect of electrostatic interactions between methacrylic acid as a weak cation-exchanger and selected analytes (a mixture of three amino acids, and thiourea, or diethylamine) on their retention in capillary liquid chromatography was investigated. The determined run-to-run and batch-to-batch repeatabilities indicate high reliability of the preparation of the separation media.