Separation of four -lol drugs by HPLC with new bonded chiral stationary column

Abstract

Separation of betaxolol, bevantolol, metoprolol, bisoprolol with new bonded chiral stationary (3,5-dimethylcabamate cellulose) Chiralpak IB column was investigated. The factors, such as mobile phase composition and the ratio, column temperature, flow rate and the proportion of chiral additives, were also investigated. The optimal mobile phase compositions of betaxolol, bevantolol, metoprolol, bisoprolol were n-hexane/ethanol (95/5, v/v; 0.2% DEA); n-hexane/ethanol (90/10, v/v; 0.1% DEA); hexane/ethanol (60/40, v/v; 0.1% DEA); n-hexane/ethanol (95/5, v/v; 0.2% DEA), respectively. The optimal temperature was 30°C with a flow rate of 0.8 mL min-1. The detection wavelength, by 1200VWD UV detector, of betaxolol, bevantolol, metoprolol, bisoprolol was 259, 274, 224 and 223 nm, respectively. Experimental results demonstrated that baseline separation (R s>1.5) of the betaxolol, bevantolol, metoprolol, bisoprolol enantiomers were obtained with new bonded Chiralpak IB column. This method can be used for analysis and detection of these four drugs. © 2013 The Author(s).