Performance of different C18 columns in reversed-phase liquid chromatography with hydro-organic and micellar-organic mobile phases
Impacto
Scholar |
Otros documentos de la autoría: Ruiz Ángel, M. J.; Pous Torres, Sandra; Carda-Broch, Samuel; García Álvarez-Coque, M. C.
Metadatos
Mostrar el registro completo del ítemcomunitat-uji-handle:10234/9
comunitat-uji-handle2:10234/7013
comunitat-uji-handle3:10234/8638
comunitat-uji-handle4:
INVESTIGACIONEste recurso está restringido
10.1016/j.chroma.2014.04.011 |
Metadatos
Título
Performance of different C18 columns in reversed-phase liquid chromatography with hydro-organic and micellar-organic mobile phasesFecha de publicación
2015-06-22xmlui.dri2xhtml.METS-1.0.item-edition
Copyright © 2014 Elsevier B.V. All rights reserved.ISSN
0021-9673Tipo de documento
info:eu-repo/semantics/articleVersión de la editorial
http://www.sciencedirect.com/science/article/pii/S0021967314005639Versión
info:eu-repo/semantics/publishedVersionPalabras clave / Materias
Resumen
Column selection in reversed-phase liquid chromatography (RPLC) can become a challenge if the target compounds interact with the silica-based packing. One of such interactions is the attraction of cationic solutes to ... [+]
Column selection in reversed-phase liquid chromatography (RPLC) can become a challenge if the target compounds interact with the silica-based packing. One of such interactions is the attraction of cationic solutes to the free silanols in silica-based columns, which is a slow sorption–desorption interaction process that gives rise to tailed and broad peaks. The effect of silanols is minimised by the addition of a competing agent in the mobile phase, such as the anionic surfactant sodium dodecyl sulphate (SDS). In micellar-organic RPLC, the adsorption of an approximately fixed amount of SDS monomers gives rise to a stable modified stationary phase, with properties remarkably different from those of the underlying bonded phase. The chromatographic behaviour (in terms of selectivity, analysis time and peak shape) of eight C18 columns in the analysis of weakly acidic phenols and basic β-blockers was examined with hydro-organic and micellar-organic mobile phases. The behaviour of the columns differed significantly when the cationic basic drugs were eluted with hydro-organic mobile phases. With micellar-organic mobile phases, the adsorption of surfactant, instead of making the columns similar, gave rise to a greater diversity of behaviours (especially in terms of selectivity and analysis time), for both groups of phenols and β-blockers, which should be explained by the residual effect of the underlying bonded stationary phase and the different amount of surfactant covering the packing. Therefore, the implementation of a micellar-organic procedure in RPLC will depend significantly on the selected type of C18 column. [-]
Publicado en
Journal of Chromatography A, 2014, 1344: 76-82Derechos de acceso
Copyright © 2014 Elsevier B.V. All rights reserved.
http://rightsstatements.org/vocab/InC/1.0/
info:eu-repo/semantics/restrictedAccess
http://rightsstatements.org/vocab/InC/1.0/
info:eu-repo/semantics/restrictedAccess
Aparece en las colecciones
- QFA_Articles [825]