title: [Separation of enantiomeric labetalol by reversed-phase high performance liquid chromatography].
abstract: A reversed-phase high performance liquid chromatographic method for the separation of labetalol enantiomers was developed. In the method, 2, 3, 4, 6-tetra-O-acetyl-beta-D-glucopyranosyl isothiocyanate (GITC) was chosen as the reagent for pre-column chiral derivatization of labetalol to give four diastereomeric thiourea derivatives. These derivatives were efficiently separated on a Nova-Pak C18 column using V(MeOH):V(0.01 mol.L-1(pH 7.00) H2PO4(-)-HPO(4)2- buffer) = 51:49 as the mobile phase and detected by UV detector at a wavelength of 250 nm or fluorescence detector at lambda ex = 340 nm and lambda em = 440 nm. The effects of the pH of mobile phase on the retention and fluorescence absorbance are also discussed.
authors.affiliation: Chongqing University of Medical Sciences, Chongqing, 400046.
authors.forename: H
authors.initials: H
authors.lastname: Zhao
authors.forename: H
authors.initials: H
authors.lastname: Li
authors.forename: Z
authors.initials: Z
authors.lastname: Qui
mesh_terms: D000317:Adrenergic alpha-Antagonists / Q000737:chemistry / Q000302:isolation & purification*; D000319:Adrenergic beta-Antagonists / Q000737:chemistry / Q000302:isolation & purification*; D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D007741:Labetalol / Q000737:chemistry / Q000302:isolation & purification*; D013237:Stereoisomerism
chemical_list: D000317:Adrenergic alpha-Antagonists; D000319:Adrenergic beta-Antagonists; D007741:Labetalol