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- Title
Preparation, structural characteristics and antioxidant activity of polysaccharide and its metal chelates from the peel of Dioscorea oppositifolia L.
- Authors
Liu, Yi; Niu, Chao-Fei; Wang, Yi; Ruan, Yuan; Wang, Li; Li, Hui; Ma, Bing-Ji
- Abstract
Two metal chelates of Dioscorea oppositifolia L. peel polysaccharides (DTP) were prepared: iron chelate (DTP-Fe) and zinc chelate (DTP-Zn). The physicochemical properties of the polysaccharide and its metal chelates were assessed by UV-Vis absorption spectroscopy, Fourier-transform infra-red spectroscopy, scanning electron microscopy, and thermogravimetric analysis. Antioxidant activities were evaluated by DPPH, ABTS + and hydroxyl radical scavenging assays. According to ICP-MS, the iron content of DTP-Fe was 9.47%, while the zinc content of DTP-Zn was 4.02%. The antioxidant capacity of DTP-Fe increased with the increase of concentration, and its overall activity was higher than that of DTP and DTP-Zn. This polysaccharide-iron chelate can be developed and utilised as an antioxidant and multifunctional iron supplement. DTP-Zn showed the potential to be a natural antioxidant and zinc supplement food.
- Subjects
IRON chelates; ZINC supplements; DIETARY supplements; POLYSACCHARIDES; HYDROXYL group
- Publication
Natural Product Research, 2025, Vol 39, Issue 1, p119
- ISSN
1478-6419
- Publication type
Academic Journal
- DOI
10.1080/14786419.2023.2255917