ABSTRACT
Objective: To establish HPLC method for the simultaneous determination of protopine, palmatine hydrochloride, berberine hydrochloride, dehydrocorydaline, tetrahydropalmatine, tetrahydroberberine, and corydaline in Cuyanhusuo Granule. Methods: The analysis was performed on Ultimate AQ-C18 column (250 mm×4.6 mm, 5 μm) by gradient elution of acetonitrile-0.1% phosphoric acid (adjust to pH 6.0 with triethylamine) (10:90). The UV detection wavelength was set at 280 nm and the flow rate was 1.0 mL/min. Results: The linear ranges of protopine, palmatine hydrochloride, berberine hydrochloride, dehydrocorydaline, tetrahydropalmatine, tetrahydroberberine, and corydaline were 6.8-119.0 (r=0.9999), 24.38-426.65 (r=0.9999), 8.88-155.40 (r=0.9999), 77.66-1359.05 (r=0.9999), 41.4-724.5 (r=0.9999), 6.70-117.25 (r=0.9999), and 25.50-446.25 ng (r=0.9999). The average recoveries (n=6) were 98.2% (RSD=2.0%), 99.6% (RSD=2.8%), 100.2% (RSD=1.3%), 99.0% (RSD=2.2%), 100.8% (RSD=2.6%), 98.7% (RSD=2.5%), and 97.7% (RSD=2.2%), respectively. Conclusion: This method is simple and rapid, and can be used for the quality control of Cuyanhusuo Granule with satisfactory separation and repeatability.