Objective: To establish a method for determining the entrapement efficiency of tetrandrine liposomes.Methods: The sephadex G-50 column was used for separating liposomes from free drugs,and then the entrapment efficiency of tetrandrine liposomes was determined by high performance liquid chromatography(HPLC).Results: The tetrandrine liposomes could be effectively separated from free drugs using sephadex G-50.Tetrandrine showed a good linear relation with the peak area at a range of 2~12 μg/ml,y=18 368 x-897.3...