Structural diversity and antioxidant activity of condensed tannins fractionated from mangosteen pericarp

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

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Author(s)

  • Hai-Chao Zhou
  • Yi-Ming Lin
  • Shu-Dong Wei
  • Nora Fung-Yee Tam

Detail(s)

Original languageEnglish
Pages (from-to)1710-1720
Journal / PublicationFood Chemistry
Volume129
Issue number4
Publication statusPublished - 15 Dec 2011

Abstract

The extract from mangosteen pericarp was separated into eight fractions, four by solvent extraction (hexane, FH; petroleum ether, FP; ethyl acetate, FE; water, FW) and the other four by fractionation on Sephadex LH-20 column (fractions F1, F2, F3, and F4). Phenolic compounds were identified as the major antioxidant components in each fraction. UV-VIS spectrum, reversed-phase HPLC-ESI-MS coupled with thiolysis, normal-phase HPLC-ESI-MS and MALDI-TOF-MS analyses complementally showed that the phenolic-rich fractions were condensed tannins with structural heterogeneity in monomer units, degree of polymerization and interflavan linkages. Mangosteen condensed tannins predominately contained procyanidins with a significant amount of propelargonidin but much lower signals of prodelphinidin. Eicosapentamers of condensed tannins were detected by MALDI-TOF-MS. Both B-type and A-type linkages were present. Condensed tannins fractions from mangosteen pericarp, especially fractions F3 and FE, can be explored as beneficial food antioxidants because of their high yields and potent antioxidant activities. © 2011 Elsevier Ltd. All rights reserved.

Research Area(s)

  • Antioxidant activity, Condensed tannins, Degree of polymerization, Fractionation, Mangosteen pericarp, Structure-activity

Citation Format(s)

Structural diversity and antioxidant activity of condensed tannins fractionated from mangosteen pericarp. / Zhou, Hai-Chao; Lin, Yi-Ming; Wei, Shu-Dong et al.
In: Food Chemistry, Vol. 129, No. 4, 15.12.2011, p. 1710-1720.

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review