Table 2. Antioxidant Activities of Nanocarbons, Including Reducing Power, DPPH Free-Radical Scavenging Activity, and Ferrous Ion-Chelating Powera.
| concentration (mg/L) | DPPH (%) | chelating (%) | reducing power (OD700) | |
|---|---|---|---|---|
| vitamin C | 100 μM | 93.4 ± 0.1 | ||
| EDTA | 100 μM | 90.4 ± 0.0 | ||
| BHA | 100 μM | 1.86 ± 0.05 | ||
| MWCNT | 1 | 9.6 ± 0.5 | 13.8 ± 0.2 | 0.99 ± 0.06 |
| 5 | 17.3 ± 1.0 | 21.4 ± 0.5 | 1.04 ± 0.07 | |
| 10 | 19.2 ± 0.3 | 29.2 ± 0.8 | 1.11 ± 0.04 | |
| short MWCNT | 1 | 5.4 ± 0.4 | 11.5 ± 0.2 | 1.09 ± 0.00 |
| 5 | 8.8 ± 0.1 | 22.4 ± 0.3 | 1.11 ± 0.00 | |
| 10 | 12.1 ± 0.3 | 28.7 ± 0.7 | 1.13 ± 0.03 | |
| GONR | 1 | 5.0 ± 1.0 | 33.8 ± 0.2 | 1.02 ± 0.07 |
| 5 | 15.2 ± 0.2 | 41.4 ± 0.5 | 1.13 ± 0.00 | |
| 10 | 26.8 ± 0.3 | 69.7 ± 0.6 | 1.15 ± 0.01 | |
| short GONR | 1 | 5.2 ± 1.0 | 35.5 ± 0.3 | 1.07 ± 0.06 |
| 5 | 16.8 ± 0.6 | 43.2 ± 0.1 | 1.15 ± 0.02 | |
| 10 | 30.0 ± 0.4 | 68.9 ± 0.3 | 1.11 ± 0.00 |
a
All data points were done in triplicates.