Optimization of Extraction Process of Weiliuxiao Granules by Orthogonal Test

Objective To optimize the extraction process of Weiliuxiao granules.Methods With the cotents of astragaloside,psoralen and isopsoralen as the indexes,the amount of water,the extracting time and the number of times as the factors,orthogonal test was employed for selecting the optimum extraction process.Results The best extraction process was that adding 14 times of water,extracting 0.5 h and three times.Conclusion The extraction process selected by orthogonal test is reasonable and favorable for industrial production.