Optimization of Alcohol Refluxing Extraction Technique of Rhizoma Corydalis and Radix Angelicae Dahuricae in Compound Yuanhu Zhitong Patch / 中国中医药信息杂志

ABSTRACT

Objective To optimize the alcohol extraction technique of the medical herbs such as Rhizoma Corydalis and Radix Angelicae Dahuricae. Methods To optimize the alcohol extraction technique with L9(34) orthogonal test. The content of the tetrahydropalmatine in Rhizoma Corydalis,which was used as evaluating criteria,was determined by HPLC. Results The optimized extraction technique was as follows the medicinal material was extracted for 3 times with 3 times amount of 75% alcohol,1.5 hours per time. Conclusions The optimized technique is reasonable and the extraction rate was high.