Table 3.
Antioxidant capacity of fruit, leaf and root bark extracts.
| Extracts | DPPH(IC50) 1 (µg/mL) |
ABTS(IC50) 2 (µg/mL) |
FRAP(RC50) 3 (µg/mL) |
|---|---|---|---|
| Fruits | 1974.3 ± 0.4 | 247.0 ± 0.8 | 725 ± 1.4 |
| Leaves | 123.5 ± 0.5 | 56 ± 1 | 192.6 ± 0.02 |
| Root barks | 85.0 ± 0.3 | 40.7 ± 0.4 | 224 ± 1 |
| Ascorbic acid 4 | 11.2 ± 0.5 | - | - |
| Trolox 5 | - | 6 ± 1 | 37.7 ± 0.3 |
1 DPPH (IC50) represents the extract concentration scavenging 50% of DPPH radical; 2 ABTS (IC50) represents the extract concentration scavenging 50% of ABTS radical; 3 FRAP (RC50) represents the extract concentration providing 50% reduction of Fe3+ to Fe2+; 4,5 represent the positive control; Results are expressed as means ± SD, n = 3.