Objective:To establish the quality standard of bronchitis mixture. Methods:Mahuang(Ephedrae Herba) and Chuanbei(Fritillaria cirrhosa D.Don) were identified by TLC. The content of ephedrine and pseudoephedrine hydrochloride in Mahuang(Ephedrae Herba) was determined by HPLC and the determination was performed on Diamonsil-C18(150mm×4.6 mm,5μm)column with mobile phase consisted of methanol-0.2mol/L sodium dihydrogen phosphate(0.3% three triethylamine,phosphoric acid to adjust the p H value of 2.5)(6:94,V/V)at ...