Table 3.
Antioxidant activity of S. crispus leaves, extracted with different solvent and collected from three different locations
| Sampling location | Solvent | DPPH free radical scavenging activity (%) | IC50 (μg/mL) | Ferric reducing antioxidant potential (μM of Fe (II)/g) | IC50 (μg/mL) |
|---|---|---|---|---|---|
| Penang | aqueous | 54.6 ± 2.776c | 78.3 ± 2.64c | 117.6 ± 4.305g | 80.6 ± 3.47c |
| ethanol | 41.7 ± 3.261f | 146.5 ± 3.60a | 59.8 ± 4.026h | 148.3 ± 3.48a | |
| Selangor | aqueous | 62.4 ± 2.226b | 58.2 ± 2.01d | 180.6 ± 6.208e | 63.2 ± 2.16d |
| ethanol | 49.2 ± 1.894e | 117.6 ± 2.64b | 126.7 ± 4.550f | 122.6 ± 2.77b | |
| Kelantan | aqueous | 73.8 ± 3.385a | 44.1 ± 3.16e | 267.5 ± 9.568b | 52.8 ± 1.76e |
| ethanol | 55.4 ± 2.628c | 80.5 ± 3.28c | 201.8 ± 7.452d | 80.7 ± 3.04c | |
| BHT | 51.6 ± 3.441d | 37.5 ± 1.59f | 250.6 ± 7.255c | 40.7 ± 1.15f | |
| α-tocopherol | 60.2 ± 4.266b | 26.4 ± 1.24g | 322.1 ± 10.150a | 29.1 ± 1.52g | |
All analyses are the mean of triplicate measurements ± standard deviation. Means not sharing a common letter in each column were significantly different at p < 0.05