Optimized preparation of poly(styrene-co- divinylbenzene-co-methacrylic acid) monolithic capillary column for capillary electrochromatography.
Electrophoresis
; 24(18): 3172-80, 2003 Sep.
Article
em En
| MEDLINE
| ID: mdl-14518041
ABSTRACT
Preparation of a poly(styrene-co-divinylbenzene-co-methacrylic acid) monolithic stationary phase for the use in capillary electrochromatography (CEC) has been improved by optimizing the polymerization conditions. It is observed that the reaction time strongly affects column efficiency, while the proportion of isooctane in porogen influences peak symmetry of some solutes seriously. The lifetime of the monolithic columns prepared mainly depends on the pH of buffers used. Reproducibility of electroosmotic flow (EOF) from batch to batch columns are lower than 2.8% relative standard deviation. Unlike other types of capillary electrochromatographic monoliths, a pH-dependent EOF was observed on this type of column. Separation of various types of compounds including aromatic hydrocarbons, hormones, anilines, basic pharmaceuticals, and peptides was achieved. The facile preparation and wide application of this monolithic column may make styrene-based polymer a potential stationary phase in CEC.
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Base de dados:
MEDLINE
Assunto principal:
Poliestirenos
/
Resinas Sintéticas
/
Cromatografia Capilar Eletrocinética Micelar
/
Metacrilatos
Idioma:
En
Ano de publicação:
2003
Tipo de documento:
Article