FOOD SCIENCE ›› 2007, Vol. 28 ›› Issue (6): 131-135.

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Study on Processing Lichi Leaves Polyphenols

 WU  Guo-Hong, XIONG  He-Jian   

  1. School of Biotechnology, Jimei University, Xiamen 361021, China
  • Online:2007-06-15 Published:2011-12-31

Abstract: In this paper, the extraction technology of polyphenols from lichi leaves was studied. Lichi leaves were ground, then infused with 5 volumes (V/W) of 70% acetone solution at room temperature for 3 times with 1 h per time. Then the extracts were concentrated. Being eliminated pigment, the decolored liquid was extracted with the same volume of acetic ether for 3 times. Ester part was concentrated and freezed out and then the polyphenols product of lichi leaves was obtained. The purity of the product is 70.21%, with a total polyphenols recovery rate 71.5%, and the elimination rate of IC50 value of DPPH as 5.71 mg/L.

Key words: lichi polyphenols, extraction, DPPH