Abstract:

Abstract: Objective: To establish the technical process for extraction and purification of astragaloside from Radix Astragali.Methods:The optimum extractive technology was investigated by using orthogonal design with the extracting rate and the contents of astragaloside as the indexes; The optimum purified technology was investigated by using single-factor test. Results: The optimum extraction condition is: Soaking in 10 times amount of water and decocting 1.5 hour eachtime for 2 times. The AB-8 macroporous absorption resins to the residue extracts had the best purified efficiency when 40% ethanol with 3BV to remove the impurity and 80% ethanol with 5BV to purify. Conclusions: The method is simple and reliable,and the extraction and the purification rate of astragaloside is higher, which can be used in industrial production.