title: Cholesterol bonded phase as a separation medium in liquid chromatography. Evaluation of properties and applications.
abstract: An extensive survey of the properties and separation capabilities of a cholesterol bonded phase is reported. The intermediate hydrophobic/hydrophilic properties of the bonded cholesterol material allows this stationary phase to be used for both reversed-phase and aqueous normal-phase separations. Interesting high selectivity is reported for the structural isomers of some antibiotics. The cholesterol bonded material does not display "phase collapse" in high aqueous content mobile phases. Variable temperature studies demonstrate that substantial structural changes of the bonded moiety occur that might be used to control selectivity. Finally, separation of some enantiomers of compounds with a variety of chemical structures is reported under reversed-phase conditions indicating that the cholesterol material may be chiral stationary phase with a broad range of applicability.
authors.affiliation: Department of Chemistry, College of Science, San Jose State University, One Washington Square, San Jose, CA 95192, USA. pesek@sjsu.edu
authors.forename: Joseph J
authors.initials: JJ
authors.lastname: Pesek
authors.forename: Maria T
authors.initials: MT
authors.lastname: Matyska
authors.forename: G Brent
authors.initials: GB
authors.lastname: Dawson
authors.forename: Alan
authors.initials: A
authors.lastname: Wilsdorf
authors.forename: Paul
authors.initials: P
authors.lastname: Marc
authors.forename: Milind
authors.initials: M
authors.lastname: Padki
mesh_terms: D000900:Anti-Bacterial Agents / Q000302:isolation & purification; D002784:Cholesterol / Q000737:chemistry*; D002853:Chromatography, Liquid / Q000379:methods*; D013237:Stereoisomerism; D013256:Steroids / Q000302:isolation & purification; D013696:Temperature
chemical_list: D000900:Anti-Bacterial Agents; D013256:Steroids; D002784:Cholesterol