Optimization of Extract Method for Astragaloside from Radix Astragali

Objective: To optimize the extraction process for astragaloside by orthogonal test.Methods: The single factor level test was used to explore the extraction effect through the ultrasonic and reflux method for astragaloside from Radix Astragali.The orthogonal test was used to investigate the extraction effect on astragaloside of three factors(concentration of alcohol;dosage of liquor;time of Abstraction) in three levels,respectively.A colorimetric method was established to determine astragaloside from Kadition Astragali in this paper.Results:Ultrasonic extraction is highly efficient,rapid and energy-saving.The optimum extracting condition is A2B3C1,that is,adding 15 times amount of 70% alcohol and ultrasonic extracting for 40 min.Conclusion:The optimized process is stable and highly efficient.