Table 5 Correlation between antioxidant activity of different extracts of selected Sudanese plants and the total content of flavonoids and phenolics in the extracts
Plants | Part used | Solvent used | DPPH (IC50in μg/ml) | Total flavonoids (mg/g) | Total phenolics (mg/g) |
|---|---|---|---|---|---|
Indgosfera spinosa | Stem | n-Hexane | >1000 | 28.1 ± 0.00 | ND |
Ethanol | 192.63 | 40.2 ± 0.04 | 115.4 ± 0.01 | ||
Methanol | 140 | 36.6 ± 0.01 | 161.4 ± 0.03 | ||
Water | >1000 | 13.3 ± 0.01 | 78.5 ± 0.001 | ||
Nicotiana gluaca | Leaves | n-Hexane | >1000 | 88.1 ± 0.01 | ND |
Ethanol | 54.76 | 77.1 ± 0.00 | 111.6 ± 0.01 | ||
Methanol | 13.437 | 64.5 ± 0.002 | 139.9 ± 0.01 | ||
Water | 30.05 | 57.6 ± 0.001 | 105.6 ± 0.01 | ||
Stem | n-Hexane | >1000 | 58.6 ± 0.02 | 3.46 ± 0.01 | |
Ethanol | 160.94 | 13.1 ± 0.01 | ND | ||
Methanol | 119.45 | 17.9 ± 0.01 | 41.02 ± 0.003 | ||
Water | 591.98 | ND | 12.5 ± 0.02 | ||
Tephrosia apollinea | Aerial part | n-Hexane | >1000 | 66.9 ± 0.01 | ND |
Ethanol | 120.22 | 78.1 ± 0.00 | ND | ||
Methanol | 48.803 | 10.7 ± 0.01 | 25.7 ± 0.00 | ||
Water | 2835.07 | 23.5 ± 0.02 | 23.5 ± 0.01 | ||
Tamarix nilotica | Leaves | n-Hexane | >1000 | 67.8 ± 0.00 | ND |
Ethanol | 880.70 | 13.1 ± 0.04 | 15.3 ± 0.04 | ||
Methanol | 12.62 | 24.9 ± 0.02 | 333.9 ± 0.01 | ||
Water | 67.53 | 22.6 ± 0.001 | 171.6 ± 0.02 | ||
Combretum hartmannianum | Leaves | n-Hexane | >1000 | 42. ±0.002 | ND |
Ethanol | 146.35 | 45.2 ± 0.001 | 169.2 ± 0.02 | ||
Methanol | 14.067 | 57.7 ± 0.001 | 392.8 ± 0.01 | ||
Water | 967.55 | 27.6 ± 0.02 | 268.2 ± 0.03 | ||
Bark | n-Hexane | >1000 | 42.1 ± 0.01 | 1.9 ± 0.01 | |
Ethanol | 9.47 | 28.1 ± 0.02 | 404.1 ± 0.06 | ||
Methanol | 28.91 | 24.2 ± 0.02 | 96.5 ± 0.05 | ||
Water | 22.47 | 29.7 ± 0.01 | 523.3 ± 0.01 | ||
Capparis decidua | Stem | n-Hexane | 212.56 | 67.5 ± 0.02 | 85.2 ± 0.01 |
Ethanol | 900.58 | 8.5 ± 0.02 | 19.9 ± 0.01 | ||
Methanol | 76.38 | 4.6 ± 0.02 | 40.3 ± 0.2 | ||
|  |  | Water | >1000 | ND | 335.7 ± 0.01 |