ABSTRACT
OBJECTIVE: To establish an HPLC method for simultaneous determination of 15 monoterpene glycosides in Radix Paeoniae Alba and seed cake of peony. METHODS: The separation was performed on an Agilent Zorbax SB C18-Aq column, using acetonitrile (A) and potassium dihydrogen phosphate solution (B) (pH 2.8) as the mobile phase by gradient elution. The elution program was as follows: 0 min(A, 9%)→8 min(A, 9%)→10 min(A, 15%)→25 min(A, 20%)→42 min(A, 35%)→50 min(A, 35%). The flow rate was 1.0 mL•min-1. The detection wavelength was maintained at 260 nm. The column temperature was set at 30 ℃. RESULTS: The linear range was 5.1-81.6 μg•mL-1 for pyrindylpaeoniflorin, 12.95-207.2 μg•mL-1 for mudanpioside F, 6.2-99.2 μg•mL-1 for oxyalbiflorin, 12.2-195.2 μg•mL-1 for oxypaeoniflorin, 8.0-128.0 μg•mL-1 for 10-hydroxypaeoniflorin, 5.5-88.0 μg•mL-1 for albiflorin, 6.0-96.0 μg•mL-1 for paeoniflorin, 6.0-96.0 μg•mL-1 for oxypaeonidanin, 5.6-89.6 μg•mL-1 for 4-O-methyl-oxypaeoniflorin, 4.7-75.2 μg•mL-1 for galloylpaeoniflorin, 5.4-86.4 μg•mL-1 for 4-O-methyl-paeoniflorin, 5.0-80.0 μg•mL-1 foralbiflorin R1, 5.7-91.2 μg•mL-1 for paeonidanin, 5.4-86.4 μg•mL-1 for benzoyloxypaeoniflorin and 6.7-107.2 μg•mL-1 for benzoylpaeoniflorin. The average recoveries of the 15 monoterpene glycosides, were between 96.8%-105.6% and the RSD values were 1.05%-3.41%. CONCLUSION: The method is simple, accurate and can be used for the quality control of peony.