Table 2.
The effect of antioxidative activity assays on Phyllanthus emblica at different concentrations.
| Concentration (mg/mL) | DPPH Free Radical Scavenging Activity (%) |
Reducing Power (OD700) | Metal Chelating Activity (%) |
|---|---|---|---|
| 0 | 0 ± 0 | 0.105 ± 0.001 | 0 ± 0 |
| 0.5 | 3.92 ± 0.07 | 0.151 ± 0.001 | 5.66 ± 0.20 |
| 1 | 7.04 ± 0.10 | 0.180 ± 0.002 | 7.72 ± 0.69 |
| 2 | 16.43 ± 0.25 | 0.205 ± 0.002 | 11.63 ± 0.66 |
| 5 | 42.43 ± 0.51 | 0.436 ± 0.006 | 15.06 ± 0.13 |
| 10 | 67.03 ± 0.07 | 0.796 ± 0.023 | 16.12 ± 0.25 |
| 50 | 88.71 ± 0.30 | 2.311 ± 0.054 | 16.92 ± 0.11 |
| Vitamin C a | 89.97 ± 0.17 | - | - |
| BHA b | - | 0.604 ± 0.002 | - |
| EDTA c | - | - | 94.43 ± 0.21 |
a Vitamin C is the positive control of DPPH radical scavenging capacity assay with the concentration of 100 μM; b BHA is the positive control of reducing power assay with the concentration of 100 μM; c EDTA is the positive control of metal chelating activity assay with the concentration of 100 μM.