METHODS The components of emodin, resveratrol and polydatin were used as the marker, the optimum uniform-design was used to optimize the extraction procedure.

• 方法：以虎杖中主要有效成分大黄素，白藜芦醇，白藜芦醇苷以及浸膏得率为指标，以均匀设计实验考察了乙醇浓度、溶媒量、提取时间、提取次数等对效果的影响。