Optimization for ultrasonic-acid hydrolysis extraction of diosgenin by response surface methodology
NIU Chun-ling, WU Sheng-ju*, SHEN Zhuang-zhi, HAO Chang-chun
(College of Physics and Information Technology, Shaanxi Normal University, Xi′an 710062, Shaanxi, China)
Abstract:
Diosgenin is extracted by ultrasonic extracting and hydrolyzing method from Dioscorea Zingiberensis Wright. By response surface methodology (RSM), the extraction conditions are optimized. The result shows that the optimum extraction conditions obtained for 10 g Dioscorea Zingiberensis Wright are as follows: ethanol concentration of 72 %, ethanol volume of 100 mL, ultrasonic time of 45 min and ultrasonic power of 420 W. The model obtained by RSM is well matched with practice conditions. Extraction yield of ultrasonic extraction is increased 26.46% compared with that of the traditional method.
KeyWords:
response surface methodology;ultrasonic;extraction;diosgenin
