Table 4.
Correlation between phytochemical contents (total phenolic content, total flavonoids, β-carotene and vitamin C) and antioxidant activity.
| Parameters | Phytochemical contents |
Antioxidant activity |
|||||
|---|---|---|---|---|---|---|---|
| TPC | TFC | β-carotene | Vitamin C | DPPH | IC50 | FRAP | |
| TPC | 1 | ||||||
| TFC | 0.83 (0.00) | 1 | |||||
| β-carotene | 0.78 (0.00) | 0.62 (0.01) | 1 | ||||
| Vitamin C | 0.86 (0.00) | 0.58 (0.01) | 0.86 (0.00) | 1 | |||
| DPPH | 0.25 (0.32) | 0.18 (0.47) | −0.21 (0.40) | −0.07 (0.79) | 1 | ||
| IC50 | −0.32 (0.20) | −0.22 (0.38) | −0.12 (0.65) | −0.06 (0.83) | −0.98 (0.00) | 1 | |
| FRAP | 0.94 (0.00) | 0.79 (0.00) | 0.80 (0.00) | 0.93 (0.00) | 0.01 (0.98) | −0.12 (0.65) | 1 |
Note: Pearson's correlation coefficient (r) and p-values (p < 0.05) are noted in parentheses. TPC = total phenolic content, TFC = total flavonoid content, DPPH = 2,2-diphenyl-1-picrylhydrazyl, FRAP = Ferric Reducing Antioxidant Power, IC50 = half-maximal inhibitory concentration.