Table 11 Correlation coefficients (R2) for the linear relationships between the antioxidant activities and contents of each free phenolic component
Compound | ChA | Epi | CaA | Rut | Iso | Ast | PrA | Que | GaA | Sco | FRAP | ABTS | DPPH |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
ChA | 1 | 0.06109 | − 0.15278 | 0.74647 | 0.90622 | 0.62171 | − 0.45845 | − 0.04528 | − 0.54529 | 0.58749 | 0.78381 | 0.69221 | 0.76781 |
Epi | – | 1 | 0.43503 | − 0.14782 | 0.23562 | 0.65714 | − 0.41698 | 0.46368 | − 0.09566 | − 0.31809 | − 0.13601 | 0.00211 | − 0.27078 |
CaA | – | – | 1 | − 0.31581 | − 0.08295 | 0.18897 | − 0.12246 | 0.06754 | 0.05357 | − 0.55668 | − 0.17605 | − 0.07144 | − 0.23755 |
Rut | – | – | – | 1 | 0.77122 | 0.46117 | − 0.25405 | − 0.10427 | − 0.51705 | 0.86516 | 0.81368 | 0.66942 | 0.81723 |
Iso | – | – | – | – | 1 | 0.7687 | − 0.34297 | 0.02399 | − 0.57575 | 0.60393 | 0.74951 | 0.67925 | 0.71518 |
Ast | – | – | – | – | – | 1 | − 0.31615 | 0.15592 | − 0.42047 | 0.23725 | 0.37703 | 0.40483 | 0.27307 |
PrA | – | – | – | – | – | – | 1 | − 0.51773 | − 0.08846 | 0.40536 | − 0.22612 | − 0.39174 | 0.03339 |
Que | – | – | – | – | – | – | – | 1 | 0.2282 | − 0.41755 | − 0.18283 | − 0.12509 | − 0.22011 |
GaA | – | – | – | – | – | – | – | – | 1 | − 0.41773 | − 0.52943 | − 0.52334 | − 0.4482 |
Sco | – | – | – | – | – | – | – | – | – | 1 | 0.76458 | 0.7181 | 0.83016 |
FRAP | – | – | – | – | – | – | – | – | – | – | 1 | 0.88975 | 0.96 |
ABTS | – | – | – | – | – | – | – | – | – | – | – | 1 | 0.76762 |
DPPH | – | – | – | – | – | – | – | – | – | – | – | – | 1 |