title: Direct separation and quantitative determination of clenbuterol enantiomers by high performance liquid chromatography using an amide type chiral stationary phase.
abstract: Enantiomers of clenbuterol were directly separated by a new high performance chromatographic method on Chirex 3005 column. Several parameters such as mobile phase composition, column temperature and flow rate were studied. Baseline enantioseparation was achieved, using the optimized mobile phase of n-hexane-1,2-dicholoethane-methanol (54:38:8, v/v/v) at 17 degrees C and 1.0 ml/min, with the separation factor (alpha) 1.43 and the resolution factor (R(S)) 1.81. The mechanism of separation was also discussed. Standard linear calibration cures were established for the R- and S-enantiomers, over the range of 26.1-1,045.8 and 5.7-229.6 nmol/ml, with the correlation coefficient of 0.9999 for both. The limits of detection were 0.47 and 1.04 nmol/ml for R- and S-enantiomers, respectively. Recovery and precision of the method were also evaluated, which had been successfully used to monitor and identify quantitatively the profile of the clenbuterol enantiomers in human serum.
authors.affiliation: Department of Chemistry, Beijing Normal University, Beijing 100875, P R China. onlywdf_1977@163.com
authors.forename: Yaru
authors.initials: Y
authors.lastname: Song
authors.forename: Defa
authors.initials: D
authors.lastname: Wang
authors.forename: Yuping
authors.initials: Y
authors.lastname: Hu
authors.forename: Xiaoxia
authors.initials: X
authors.lastname: Chen
authors.forename: Yuguo
authors.initials: Y
authors.lastname: Jiao
authors.forename: Dongyan
authors.initials: D
authors.lastname: Hou
mesh_terms: D000318:Adrenergic beta-Agonists / Q000097:blood*; D000577:Amides / Q000737:chemistry*; D002138:Calibration; D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D002976:Clenbuterol / Q000097:blood*; D006801:Humans; D012015:Reference Standards; D012680:Sensitivity and Specificity; D013056:Spectrophotometry, Ultraviolet
chemical_list: D000318:Adrenergic beta-Agonists; D000577:Amides; D002976:Clenbuterol