Quality control study on Bidouyan mixture

Objective To explore the application of HPLC method in the determination of contents of ephedrine hydrochloride in Bidouyan mixture.Methods A HPLC method detected by one wavelength-210 nm for ephedrine hydrochloride had been developed.The chromatographic procedure for determination was carried out using DiamonsilTM C 18 (250mm x 4.6mm,5 μm) as an analytic column gradient eluted with a mixture consisting of acetonitrile and 0.05％ H3PO4.Results The ranges of calibration curve of ephedrine hydrochloride was 0.011 ～ 0.277mg/ml.The established HPLC method was applied to determine 15 samples of Bidouyan mixture.The results showed that the ranges of ephedrine hydrochloride was 0.10 ～ 0.23mg/ml.Conclusion A simple,effective and feasible HPLC method to determine the contents of ephedrine hydrochloride was established for the quality control of Bidouyan mixture. Key words: Bidouyan mixture;  Ephedrine hydrochloride;  Chromatography, high performance liquid chromatography;  Quality control