[Quality evaluation of prepared slices of Paeonia lactiflon--determination of paeoniflorin by HPLC].

OBJECTIVE To establish the quality criteria of the prepared slices of Paeonia lactiflon. METHOD RP-HPLC was used for the determination of paeoniflorin in 10 lots of samples by ultrasound-assisted extraction. RESULT The samples were extracted with 50% methanol. Seperation of the solution was performed on an ODS column with a mobile phase of acetonitrile-water (18:82), detected at 230 nm. CONCLUSION The method is simple, repeatable, accurate and applicable.