Table 4.
Pearson’s correlation coefficients (r) for some of the investigated parameters of the three extracts of A. arboreum leaves.
| TPC | TFC | CTs | DPPH• | ABTS•+ | FRAP | CAT | |
|---|---|---|---|---|---|---|---|
| TPC | 1 | - | - | - | - | - | - |
| TFC | 0.962 ** | 1 | - | - | - | - | - |
| CTs | 0.227 ns | −0.008 ns | 1 | - | - | - | - |
| DPPH• | 0.906 ** | 0.786 ** | 0.583 * | 1 | - | - | - |
| ABTS•+ | 0.837 ** | 0.663 * | 0.652 * | 0.929 ** | 1 | - | - |
| FRAP | 0.858 ** | 0.696 * | 0.673 * | 0.977 ** | 0.983 ** | 1 | - |
| CAT | 0.628 * | 0.435 ns | 0.557 ns | 0.667 * | 0.894 ** | 0.798 ** | 1 |
Pearson’s correlation coefficients using the 95% confidence interval. TPC: total phenolics content, TFC: total flavonoids content, CT: condensed tannins, DPPH•: antioxidant capacity based on the DPPH• assay, ABTS•+: antioxidant capacity based on the ABTS•+ assay, FRAP: antioxidant capacity based on the FRAP assay, TAC: total antioxidant capacity based on the QuantiChrom™ antioxidant assay, ns non-significant, ** p < 0.01; * p < 0.05 (two-tailed).