Table 7.
Antioxidant activity and total phenolic content of the essential oil and methanol extract of Zanthoxylum alatum.
| Sample | DPPH radical scavenging IC50 (mg/mL) |
Reducing power IC50 (mg/mL) |
% Chelation power at 0.5 mg/mL | TPC (mg g−1 GAE) |
|---|---|---|---|---|
| Essential oil | 6.04 ± 0.08 | 11.9 ± 0.29 | 42.1 ± 1.03 | 19.3 ± 0.34 |
| Crude methanolic extract | 0.067 ± 0.002 | 0.39 ± 0.01 | 43.8 ± 1.92 | 366.3 ± 15.3 |
| Chloroform fraction | 0.155 ± 0.004 | 1.47 ± 0.04 | 41.2 ± 0.47 | 139.5 ± 4.03 |
| Ethyl acetate fraction | 0.51 ± 0.01 | 1.15 ± 0.03 | 60.1 ± 2.71 | 155.8 ± 7.62 |
| Acetone fraction | 0.086 ± 0.003 | 0.96 ± 0.02 | 40.5 ± 0.98 | 187.6 ± 6.09 |
| Methanolic fraction | 0.044 ± 0.001 | 0.3 ± 0.001 | 41.2 ± 1.02 | 383.5 ± 11.4 |
| BHT | 0.013 ± 0.000 | 0.14 ± 0.001 | — | — |
| BHA | 0.01 ± 0.000 | 0.11 ± 0.003 | — | — |
| Quercetin | — | — | 42.7 ± 0.80 | — |
Values are given as mean ± SD (n = 3).