Table 2.
The content of TFC and TPC and antioxidant activity of EE, EAE, EF-B, and EF-D (IC50, μg/mL).
| Samples | IC50 (μg/mL) | A 0.5 (μg/mL) | TFC (mg RE/g extract) |
TPC (mg GAE/g extract) |
|
|---|---|---|---|---|---|
| DPPH | ABTS | FRAP | |||
| EE | 101.715 ± 2.007 | 3.110 ± 0.493 | 37.972 ± 1.579 | 281.9 ± 2.0 | 195.536 ± 2.0 |
| EAE | 156.956 ± 2.370 | 7.071 ± 0.849 | 34.980 ± 1.544 | 335.3 ± 25.9 | 110.58 ± 4.77 |
| EF-B | 300.190 ± 2.477 | 5.915 ± 0.772 | 53.823 ± 1.731 | 106.4 ± 113.7 | 108.83 ± 2.08 |
| EF-D | 64.380 ± 1.809 | 5.531 ± 0.743 | 21.271 ± 1.328 | 397.1 ± 5.0 | 165.95 ± 1.45 |
| VC | 4.625 ± 0.665 | 2.613 ± 0.417 | nd | nd | nd |
| BHT | nd | nd | 75.688 ± 1.879 | nd | nd |
IC50: concentration that causes 50% scavenging in radical concentration; TFC: total flavonoid content; RE: rutin equivalents; TPC: total phenolic content; GAE: gallic acid equivalents; nd: not determined. All values are represented as mean ± SD (n = 3).