FOOD SCIENCE ›› 2004, Vol. 25 ›› Issue (5): 115-119.

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Study on Preparation and Quality Analysis of Egg Yolk Lecithin

 WU  Xiao-Ying, LIN  Ying, YE  Qian-Jun, LI  Jing-Jing   

  1. Department of Bioengineering, South China University of Technology
  • Online:2004-05-15 Published:2011-10-24

Abstract: The preparation approach and quality analysis egg yolk lecithin were discussed in this paper. The 70% rough lecithinfrom fresh egg yolk was extracted three times with ethanol under different conditions and precipitated by acetone. 10% ZnCl2precipitator was used to purify rough lecithin further. About 80% recovery of refined lecithin was obtained, with the content ofphospholipid over 90%. The maximum ultraviolet absorb peak of product occurred at 215nm. The TLC results showed that thelecithin prepared had two clear spots, PC and PE.

Key words: egg yolk, lecithin, organic solvent, metal salt precipitant, extraction, purification