مشخصات پژوهش

The antioxidant properties of biological samples, foods, extracts, and pure substances are measured by using different methods involving free radicals, but none provide quantitative information on the relative ease of oxidation, an important factor in antioxidant properties. Compounds which are antioxidants by virtue of their ability to act as reluctants in solution tend to be easily oxidized at inert electrodes [1,2]. In the present study, aqueous extract of Malva sylvestris L. flower was investigated by cyclic and differential pulse voltammetry techniques in the biological pH at the surface of glassy carbon electrode at various concentrations and scan rates. The results revealed that the extract had an irreversible redox reaction. Oxidation peak currents are linearly dependent on the square root of the scan rate, which is typical of a diffusion controlled electrochemical process. Antioxidant activities of this extract was evaluated using the 2,2-diphenyl-2-picrylhydrazyl (DPPH) radical-scavenging method and it is directly related to its redox potential value. The results show the good antioxidant activity of the Malva sylvestris L. flower extract and the electrochemical behavior of the constituents in it, at glassy carbon electrode.