Table 4.
The antioxidant activity of P. graveolens EOs expressed as IC50.
| Method | P. graveolens EOs | Positive Controls | |||
|---|---|---|---|---|---|
| Vegetative Stage | Beginning Flowering Stage | Full Flowering Stage | Ascorbic Acid | Trolox | |
| DPPH | 138.23 ± 0.16 c | 119.49 ± 2.01 d | 83.26 ± 0.01 e | 15.13 ± 0.04 a | 24.31 ± 0.02 b |
| FRAP | 151.21 ± 0.08 c | 139.35 ± 0.12 d | 116.42 ± 0.07 e | 31.47 ± 1.07 a | 48.25 ± 0.05 b |
| ABTS | 174.95 ± 1.14 c | 153.09 ± 0.05 d | 132.25 ± 0.11 e | 42.22 ± 0.05 a | 61.48 ± 1.32 b |
| H 2 O 2 | 77.35 ± 0.04 b | 64.81 ± 1.14 c | 48.67 ± 0.04 d | 23.34 ± 0.03 a | - |
Different letters indicate significant differences (p < 0.05; n = 3). P. graveolens: Pelargonium graveolens; EOs: essential oils; DPPH: 1,1-diphenyl-2-picrylhydrazyl; FRAP: ferric reducing antioxidant power; ABTS: 3 ethylbenzothiazoline 6-sulfonate; H2O2: hydrogen peroxide.