Simultaneous Determination of Seven Ingredients in Compound Theophylline Tablets by Reversed Phase High Performance Liquid Chromatography Gradient Elution
A reversed phase high performance liquid chromatography ( RP-HPLC) gradient elution method was proposed for the simultaneous determination of seven active ingredients in compound theophylline tablets. A YWG C18 column and a binary mobile phase of methanol and sodium dihydrogen phosphate were used. A photo-diode array detector was used to detect the compositions with 214 nm as the detection wavelength. The whole process could be performed within 15 minutes. The proposed method was accurate and rapid with wid...