FOOD SCIENCE ›› 2007, Vol. 28 ›› Issue (10): 64-67.

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Study on Pigment Characteristics of Walnut Outer Peel

 LING  Qing-Zhi, YUAN  Huai-Bo, GAO  Ming-Hui, DOU  Ben-Yin, JIANG  Li, WEI  Zhao-Jun   

  1. 1.Zhejiang Pharmaceutical College, Ningbo 315100, China; 2.School of Biotechnology and Food Engineering, Hefei University of Technology, Hefei 230009, China
  • Online:2007-10-15 Published:2011-11-22

Abstract: The pigment of walnut (Ningguo, Anhui Province) outer peel was extracted by the means of soaking in hot water. Meanwhile its outward, color, solution, light spectrum characteristics and stability were studied. The result indicated that the pigment of walnut outer peel is a wine-red mixture and well dissolved. The pigment is unstable under light but has a good stability for temperature, alcohol, salt and sucrose. Thus the pigment of walnut outer peel has a good prospect as an edible pigment.

Key words: walnut outer peel, pigment, characteristic