FOOD SCIENCE ›› 2011, Vol. 32 ›› Issue (16): 62-66.doi: 10.7506/spkx1002-6630-201116013

• Processing Technology • Previous Articles     Next Articles

Response Surface Methodology as an Approach to Optimize Catalpol Extraction from Radix Rehmannia glutinosa

XU Ding-hua,ZHU Wen-xue*   

  1. (College of Food and Bioengineering, Henan University of Science and Technology, Luoyang 471003, China)
  • Online:2011-08-25 Published:2011-07-26

Abstract: Objective: To optimize the process parameters of solvent reflux extraction of catalpol from Radix Rehmannia glutinosa. Methods: On the basis of one-factor-at-a-time experiments, response surface methodology (RSM) was used for process parameter optimization. A regression model was established describing catalpol extraction yield as a response to various process parameters. Results: The optimal extraction conditions were 72.94% methanol aqueous solution as the extraction solvent, extraction temperature 54.8 ℃, extraction time 3.0 h and number of repeated extractions 2. Under these conditions, the catalpol extraction yield was 3.513%. Conclusion: The established regression model can accurately and conveniently predict catalpol extraction yield. The optimal extraction process obtained is efficient and feasible.

Key words: Rehmannia glutinosa Libosch, catalpol, extraction, response surface methodology

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