Characterization of silica-based octyl phases of different bonding density

Autor:	Mahinda Gangoda, Y. Bereznitski, M. Jaroniec
Rok vydání:	1998
Předmět:	Chromatography Organic Chemistry Analytical chemistry Sorption General Medicine Reversed-phase chromatography Biochemistry Analytical Chemistry Thermogravimetry chemistry.chemical_compound symbols.namesake Homologous series Gibbs isotherm chemistry symbols Methylene Selectivity Acetonitrile
Zdroj:	Journal of Chromatography A. 828:59-73
ISSN:	0021-9673
DOI:	10.1016/s0021-9673(98)00830-9
Popis:	The goal of the current work was to evaluate changes in the surface composition of the stationary phase as a function of the bonded ligand density. To fulfill this purpose several octyl phases of different surface coverage were synthesized from the same support silica. For each chromatographic system the methylene selectivity measurements were used to estimate the equilibrium sorption constant and surface excess of acetonitrile in the stationary phase. The differences in the stationary phase composition were correlated with the surface properties of the corresponding chromatographic packings, which were characterized by nitrogen adsorption, thermogravimetry and solid-state NMR.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::d67ac7f9fab0b4da98552ef676192b84 https://doi.org/10.1016/s0021-9673(98)00830-9 Zobrazit plný text záznamu Full Text from ScienceDirect