TABLE 2.
Ferric-reducing antioxidant power assay. The % of reduced ferric ions by Euphrasia officinalis L. extracts is compared to the control (0% reduction)
| Extract | Extract concentration (μg/mL) | % reduction (Fe3+→Fe2+) as compared to control (0% reduction) | Reduction value, which correspond to the following ascorbic acid concentration (μg/mL) |
|---|---|---|---|
| Ethanol | 25 | 56.18±0.54 | 10.95 |
| 75 | 173.66±1.86 | 33.86 | |
| 125 | 293.82±3.55 | 57.29 | |
| Ethyl acetate | 25 | 46.77±0.62 | 9.12 |
| 75 | 125.27±1.39 | 24.42 | |
| 125 | 213.71±1.61 | 41.67 | |
| Heptane | 25 | 4.57±0.54 | 0.89 |
| 75 | 10.48±1.03 | 2.04 | |
| 125 | 14.52±1.39 | 2.83 |