The paeoniflorin in Radix Paeoniae Alba was reflux extracted with 80% ethanol twice,1h per time,8 and 6 times in volume vs weights of the Radix Paeoniae Alba,respectively.

• 用80%25乙醇回流提取芍药苷两次,第1次用8倍量乙醇,第2次用6倍量乙醇,1 h/次。