Naturally present metal ions in plants could interfere with common antioxidant assays.

ABSTRACT: Most of the commonly applied assays used to assess antioxidant properties of plant extracts exploit the ability of some biologically active metabolites to participate in oxidation-reduction reactions with metal ions. On the other hand, most plants contain different chelated metal ions whose levels depend on the geographic origin, soil, and environmental pollutions. In this study the levels of redox-active metal ions in three plant sources were measured and extracts of these botanicals were treated with Chelex^Ⓡ - an ion exchanger that is noteworthy for its ability to bind transition metal ions. The original and chelated extracts were subjected to three antioxidant assays based on single electron transfer. The results obtained showed statistically significant differences between t

SUBMITTER: Tomova T 

PROVIDER: S-EPMC7390811 | biostudies-literature | 2020

REPOSITORIES: biostudies-literature