Abstract
The aim of the study was to evaluate the antioxidant and free radical scavenging properties and to determine the phenolic content of the ethanol extract from five Mentha species [M. longifolia (L.) Huds., M. piperita L., M. pulegium L., M. rotundifolia (L.) Huds., and M. spicata L.]. The antioxidant activities of the extracts were investigated with two different methods, 2,2’-diphenyl-1-picrylhydrazyl radical (DPPH•) and 2,2’-azinobis (3-ethylbenzothiazoline-6-sulfonic acid) radical (ABTS•+). M. piperita exhibited the strongest activity as a DPPH• scavenger. On the other hand, all the extracts were active in the ABTS•+ assay and no significant difference was observed in this assay. The total phenolic content (TPC) of the extracts was determined by Folin-Ciocalteu method and M. piperita showed the highest TPC. A high correlation was found between the DPPH• scavenging potency and the total phenolic content of the extracts (r2 > 0.989).
Keywords
Total phenolic content Mentha species Labiatae antioxidant activity
Copyright
© 2022, Author(s). This open-access article is available under the Creative Commons Attribution 4.0 (CC BY 4.0) International License (https://creativecommons.org/licenses/by/4.0/), which allows for unrestricted use, distribution, and reproduction in any medium, provided that the original work is properly cited.