title: Column-switching techniques in the biomedical analysis of stereoisomeric drugs: why, how and when.
abstract: The application of stereoselective chromatographic techniques to bioanalytical problems has become a routine procedure. However, this approach is not always straightforward; particularly when the separation involves chromatographic chiral stationary phases. Matrix interferences and more importantly, overlapping metabolite peaks often make direct analysis impractical. One strategy to overcome these problems is to combine two or more columns with different selectivities to produce a multi-dimensional chromatographic system. This review addresses the use of coupled column chromatography in HPLC systems including different coupling methods and the application of the resulting arrangements to bioanalytical analyses.
authors.affiliation: Department of Oncology, McGill University, Montreal General Hospital, Que, Canada.
authors.forename: K
authors.initials: K
authors.lastname: Fried
authors.forename: I W
authors.initials: IW
authors.lastname: Wainer
mesh_terms: D000818:Animals; D002851:Chromatography, High Pressure Liquid / Q000295:instrumentation / Q000379:methods*; D006801:Humans; D002955:Leucovorin / Q000302:isolation & purification; D013237:Stereoisomerism; D013629:Tamoxifen / Q000302:isolation & purification; D014700:Verapamil / Q000031:analogs & derivatives / Q000302:isolation & purification; D015215:Zidovudine / Q000031:analogs & derivatives / Q000302:isolation & purification
chemical_list: D013629:Tamoxifen; D015215:Zidovudine; C016904:norverapamil; C055886:3'-azido-3'-deoxy-5'-O-beta-glucopyranuronosylthymidine; D014700:Verapamil; D002955:Leucovorin