FOOD SCIENCE ›› 2013, Vol. 34 ›› Issue (8): 136-139.doi: 10.7506/spkx1002-6630-201308027

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Removal of Tannins from Quercus mongolica Fisch Acorns

CAO Hai-xia,YANG Xiao-qing   

  1. College of Food Science and Engineering, Inner Mongolia Agricultural University, Hohhot 010018, China
  • Received:2011-12-01 Revised:2013-02-02 Online:2013-04-25 Published:2013-05-07

Abstract: An ultrasonic-assisted solvent extraction method for the removal of tannins from acorns, Quercus mongolica Fisch, was explored in this work. Main process parameters influencing the removal efficiency of tannins were identified by one-factor-at-a-time method and optimized by orthogonal array design. Optimum removal conditions were obtained when using 40% ethanol as the extraction solvent at a solid-to-liquid ratio to extract acorn powder with particle size over 80 mesh at 55 ℃ for 60 min with an ultrasonic power of 400 W. The maximum removal efficiency of tannins observed under the optimum conditions was 69.99 mg/g.

Key words: Quercus mongolica Fisch acorn, ultrasonic, tannins, removal

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