Table 6.
Correlation between chemical composition and antioxidant effect (as heatmap).
| Sample Origin |
Method | Unit | TPC | TFC | TPC-TFC a |
|---|---|---|---|---|---|
| All (n = 102) |
TPC | GAE [mg/g] | - | ||
| TFC | ME [mg/g] | 0.28 | - | ||
| TPC-TFC | [mg/g] | 0.6 | −0.6 | - | |
| DPPH | Inhibition [%] | 0.19 | 0.69 | −0.41 | |
| ABTS | Inhibition [%] | 0.25 | 0.49 | −0.2 | |
| FRAP | Fe(II) [mM/g] | 0.25 | 0.72 | −0.39 | |
| Albania + Greece (n = 24) |
TPC | GAE [mg/g] | - | ||
| TFC | ME [mg/g] | 0.39 | - | ||
| TPC-TFC | [mg/g] | 0.61 | −0.49 | - | |
| DPPH | Inhibition [%] | 0.54 | 0.81 | −0.19 | |
| ABTS | Inhibition [%] | 0.48 | 0.45 | 0.08 | |
| FRAP | Fe(II) [mM/g] | 0.29 | 0.88 | −0.49 | |
| Turkey (n = 44) |
TPC | GAE [mg/g] | - | ||
| TFC | ME [mg/g] | 0.46 | - | ||
| TPC-TFC | [mg/g] | 0.54 | −0.5 | - | |
| DPPH | Inhibition [%] | 0.24 | 0.51 | −0.26 | |
| ABTS | Inhibition [%] | 0.23 | 0.53 | −0.27 | |
| FRAP | Fe(II) [mM/g] | 0.4 | 0.71 | −0.29 |
n, number of infusions; a, difference between TPC and TFC values.