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Lycium barbarum;polysaccharides;authenticity;composition;content;determination method

LIU Yuan-cai,SUN Xi-zhen*,XU Yin,LI Xian-zhi,YAN Ling   

  1. Jing Brand Co. Ltd., Daye 435100, China
  • Online:2013-06-25 Published:2013-06-17

Abstract:

An improved phenol-sulfuric acid method for the determination of Lycium barbarum polysaccharides was
proposed by using mixed monosaccharide standards instead of glucose alone for prepration of a standard curve. The
monosacccharide composition of samples was determined by HPLC after hydrolysis and subsequent derivatization
for disrimination between real and fake Lycium barbarum polysaccharides. The polysaccharide content of LBP-1, a
polysaccharide extract of Lycium barbarum prepared in our laboratory, was determined by the improved method to be 30%
compared to only 14% with the traditional method.

Key words: Lycium barbarum, polysaccharides, authenticity, composition, content, determination method