Method: Sample solution were extracted by ultrasonic in different power and frequency and by reflux.
方法：用不同功率和频率的超声仪提取及加热回流提取样品液。
Methods: Repeatedly reflux extracted by Soxhlet extractor.
方法：索氏提取器多次回流提取。
The main results of this dissertation were described as following:The roots of C. auriculatum was extracted by ethanol through heating reflux, then purified by chemical extraction.
主要研究结果如下：采用加热回流提取法，对白首乌进行乙醇提取，并通过化学萃取得到总甾苷。
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