Simultaneous Determination of Dehydrocorydine and Salvianolic Acid B in Shuangshen Tongguan Capsules by HPLC-dual Wavelength Switching Method / 中国药房

ABSTRACT

OBJECTIVE： To develop an method for determining the contents of dehydrocorydine and salvianolic acid B in Shuangshen tongguan capsules simultaneously. METHODS： The HPLC-dual wavelength switching method was used. The determination was performed on Waters symmetry C18 column with mobile phase consisted of acetonitrile-0.05％ phosphoric acid solution （gradient elution） at the flow rate of 1.0 mL/min， the detection wavelength was 286 nm （salvianolic acid B） and 336 nm （dehydrocorydine）. The column temperature was maintained at 25 ℃， and sample size was 10 μL. RESULTS： Under this condition， dehydrocorydaline and salvianolic acid B could be separated in baseline. The linear range of them were 0.157-1.259 μg and 0.391-3.131 μg （r＝0.999 9）. RSDs of precision， reproducibility and stability tests （within 24 h） were all lower than 2.00％ （n＝6-10）. The average recovery rates were 101.61％ and 102.85％ （RSD＝3.59％ and 2.85％， n＝6）. CONCLUSIONS： Established HPLC-dual wavelength switching method can be used for simultaneous determination of dehydrocorydine and salvianolic acid B in Shuangshen tongguan capsules. The method is simple and rapid， and can be used for the quality control of Shuangshen tongguan capsule.