Determination of antioxidant activity using 2,2′-diphenyl-1-picrylhydrazyl (DPPH) radical-scavenging method
The antioxidant activity of different concentrations (0.15–20 mg/mL) of EOs samples was measured in terms of hydrogen donating or radical-scavenging ability, using the stable radical DPPH (Brand-Williams, Cuvelier, & Berset, 1995). The results were expressed in percentage of inhibition as mean of three replicates.