Journal of Tianjin Agricultural University ›› 2022, Vol. 29 ›› Issue (3): 23-28.doi: 10.19640/j.cnki.jtau.2022.03.005

• Researches and Scientific Notes • Previous Articles     Next Articles

Study on extraction optimization of polyphenols from Mesembryanthemum crystallinum and its antioxidant and bacteriostatic activities

Wang Zhenlia, Wang Junbina,b,Corresponding Author, Wang Mina, Yang Zongfena, Wang Haifengc   

  1. Tianjin Agricultural University, a. College of Basic Sciences, b. Chemistry Experiment Teaching Center, c. Center for Agricultural Analysis and Measurement, Tianjin 300392, China
  • Received:2021-05-10 Online:2022-09-30 Published:2022-10-10

Abstract: In this study, the extraction method of polyphenols from Mesembryanthemum crystallinum was optimized, and the antioxidant capacity and antibacterial activity of polyphenols from M. crystallinum were determined. The results showed that the optimal extraction conditions were as follows: ethanol concentration was 60%, solid-liquid ratio was 1∶10(g: mL), extraction temperature was 80 ℃, extraction time was 120 min, under which the extraction rate of polyphenols was 1.42%. The scavenging rates of polyphenols from M. crystallinum to 1,1-diphenyl-2-trinitrophenylhydrazine(DPPH)and hydroxyl radicals increased with the increase of polyphenols concentration. When the concentration of polyphenol extract was 0.10 mg/mL, the scavenging rates of DPPH and hydroxyl radicals were 64.19% and 88.10%, respectively. The inhibitory effect of polyphenol extract on Escherichia coli was obvious. When the extract concentration was 3 mg/mL, the diameter of inhibition zone was 12 mm.

Key words: Mesembryanthemum crystallinum, polyphenol, orthogonal design, antioxidant activity, antibacterial activity

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