[1]Chinese Medicine Hospital of Lanzhou City Lanzhou 730050 China;
[2]Lanzhou Pulmonary Hospital Lanzhou 730046 China;
[3]The Second People s Hospital of Lanzhou Lanzhou 730050 China;
HPLC; Cangbaiqutong capsule; Wavelength switching; Simultaneous determination; Phellodendrine chloride; Gentiopicrin; Paeoniflorin; Tetrandrine; Quality control;