A high performance liquid chromatog.(HPLC) method for simultaneous determination of three intermediate impurities residues in vinpocetine is established.The chromatog. separation is performed on an Agilent5 HC-C18 column(5 μm,4. 6 mmx250 mm).The mobile phase consists of ammonium acetate solution-acetonitrile(57 :43),the flow rate is 1. 0 m L/min,the detection wavelength is 280 nm,the column temperature is maintained at 35°C,and the injection volume is 15 μL.It is shown that vinpocetine and the intermediate impurities such as apovincamine acid,vincamine acid and vincamine are separated completely.The calibration curves of three intermediate impurities show good linearity,with average recovery rates all above 99. 5%.This method exhibits accurate,sensitive and specific,and can be applied in simultaneous determination of three intermediate impurities residues in vinpocetine.