Simultaneous determination of dihydromyricetin and resveratrol in Ampelopsis sinica (Miq.) W.T. Wang by high-performance liquid chromatography coupled with a diode array detection method.

Yeputaoteng is the dried ground part of Ampelopsis sinica (Miq.) W.T. Wang, which is widely used in traditional Chinese medicine for preventing and treating tumors, chronic nephritis, hepatitis, rubella, traumatic bleeding, stomach heat and vomiting. A simple and reliable method using high-performance liquid chromatography with diode array detection (HPLC-DAD) was developed for the simultaneous determination of dihydromyricetin and resveratrol in Yeputaoteng. The chromatographic analysis was performed on a Dikma C18 column (250 × 4.6 mm, 5 µm) at 30°C with a gradient elution of acetonitrile and 0.1% phosphoric acid at a flow rate of 1 mL/min, and used ultraviolet detection at 292 and 306 nm. The established method was validated in terms of linearity, precision, reproducibility, stability and recovery. The calibration curves showed good linear regression (R(2) > 0.9994). Limits of detection and quantification fell in the ranges of 1.47-2.48 and 2.93-4.97 µg/mL, respectively. The mean recovery of dihydromyricetin and resveratrol was 104.1% [relative standard deviation (RSD): 2.94%] and 100.8% (RSD: 2.80%), respectively. The quantitative results indicated that the HPLC-DAD method can be effectively applied to the quality control of Yeputaoteng and its preparations.