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Optimization of Enzymatic Extraction of Flavonoids from Galangal Rhizomes (Alpinia galanga)

PENG Jing,YANG Ying,NIU Fu-ge,LI Qing-yu,JIA Lin-fei,DUAN Yu-feng,GUO Xing   

  1. College of Food Engineering and Nutritional Science, Shaanxi Normal University, Xi’an 710062, China
  • Online:2013-07-25 Published:2013-08-02

Abstract:

The cellulose-assisted extraction of flavonoids from galangal rhizomes (Alpinia galanga) was optimized by
response surface methodology based on Box-Behnken design. The extraction efficiency of flavonoids was investigated with
respect to four variables including enzyme dosage, hydrolysis time, temperature and pH, and a mathematical model was
developed. The optimal enzyme dosage, temperature, initial pH and time for extracting flavonoids from galangal rhizomes
were 30.0 U/mL, 56.6 ℃, 5.14 and 1.71 h, respectively. The extraction yield of flavonoids under these conditions was 5.08%.

Key words: galangal rhizomes, flavonoids, cellulose-assisted extraction, response surface methodology