Welcome to Chinese Agricultural Science Bulletin,

Chinese Agricultural Science Bulletin ›› 2020, Vol. 36 ›› Issue (24): 159-164.doi: 10.11924/j.issn.1000-6850.casb20190800516

Special Issue: 园艺

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Flavonoids of Toona sinensis Leaves: Separating and Purifying with D-101 Macroporous Adsorptive Resin and the Antioxidant Activity

Zou Hongfei(), Shu Xiaoyan(), Zhang Yueqin, Liu Yuan, Yang Wenyu, Zhao Guiying   

  1. School of Life Science and Engineering, Southwest University of Science and Technology, Mianyang Sichuan 621000
  • Online:2020-08-25 Published:2020-08-20
  • Contact: Shu Xiaoyan E-mail:zhf18781653620@163.com;sxy713@163.com

Abstract:

The flavonoids in leaves of Toona sinensis were separated and purified with D-101 macroporous resin to get the utmost out of the leaves. The adsorptive capacity and stability of D-101 macroporous resin for flavonoids from T. sinensis leaves were studied with the adsorption rate, elution rate and purity of total flavonoids as indexes. At the same time, the antioxidant activity of T. sinensis flavonoids was evaluated by scavenging 1,1-Diphenyl-2-picrylhydrazyl (DPPH) free radicals. The results showed that the optimum sampling condition of D-101 macroporous resin was: the sample size of T. sinensis extract was 5 BV, the flavonoids concentration was 0.69 mg/mL, and the sampling flow rate was 3 BV/h. The optimum elution condition was: 70% ethanol was used as eluent, the dosage of eluent was 5 BV, and the flow rate was 3 BV/h. When the resin was used once, the purity of flavonoids of T. sinensis could be increased from 6.0% to 45.14%, and the resin was stable and could be reused for 6 times before regeneration. The flavonoids isolated and purified by macroporous resin had strong antioxidant activity, which was 1.33 times as much as ascorbic acid.

Key words: flavonoids, separation and purification, D-101 macroporous resin, T. sinensis leaves, antioxidant activity

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