Welcome to Chinese Agricultural Science Bulletin,

Chinese Agricultural Science Bulletin ›› 2020, Vol. 36 ›› Issue (4): 135-141.doi: 10.11924/j.issn.1000-6850.casb18100113

Special Issue: 园艺

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Polyphenol Extraction from Forsythia suspensa Fruit and Application of Compound Coating Preservative in Grape Freshness Preservation

Zhang Xiaohu, Li Qian, Wei Xiaxia, Liu Gengmei, He Yong   

  1. College of Biology Pharmacy and Food Engineering, Shangluo University, Shangluo Shaanxi 726000
  • Received:2018-10-29 Revised:2019-02-15 Online:2020-02-05 Published:2020-02-08

Abstract:

The paper aims to select preservative and fresh-keeping ingredients from plant sources for food preservation. The polyphenols of Forsythia suspensa fruits were extracted by ethanol extraction combined with constant temperature magnetic stirring water bath. The optimal extraction process was determined by orthogonal design of L9(3 4). Grapes were covered by the combination made of F. suspensa polyphenol, phytic acid, calcium chloride and citric acid with chitosan. Subsequently, the fresh-keeping effect was studied. The results showed that the optimized extraction condition was: material liquid ratio of 1:10 (g:mL), the ethanol concentration of 60%, the extraction temperature of 60℃ and the extracting time of 2.5 h. Under the optimized condition, the F. suspensa fruit polyphenol extraction yield could reach 7.21%. Preservatives made of 2% F. suspensa polyphenols, 1% calcium chloride, 0.15% phytic acid, 2% citric acid and 1% chitosan could play an active role in keeping grapes fresh during storage.

Key words: Forsythia suspensa fruit, polyphenols, orthogonal experiment, ethanol, grape storage, freshness preservation

CLC Number: