Table 4.
Regression coefficient (r2), limit of detection (LOD), and limit of quantification (LOQ) of detected phenolic compounds.
| Regression Equation | r2 | LOD (mg/L) | LOQ (mg/L) |
|
|---|---|---|---|---|
| Caffeic acid | y = 111.97x − 84.67 | 0.9997 | 0.078 | 2.52 |
| p-Coumaric acid | y = 114.17x + 35.47 | 0.9999 | 0.081 | 4.01 |
| Ferulic acid | y = 127.18x − 72.81 | 0.9998 | 0.077 | 4.33 |
| 4-Hydroxyphenlyl acetate | y = 26.28x − 27.44 | 0.9996 | 0.075 | 2.32 |
| Hydroxytyrosol | y = 25.77x − 24.41 | 0.9999 | 0.088 | 4.51 |
| Oleuropein | y = 46.63x + 51.21 | 0.9997 | 0.08 | 4.15 |
| Tyrosol | y = 41.25x − 49.09 | 0.9998 | 0.081 | 2.31 |
| Vanillic acid | y = 79.88x + 18.07 | 0.9997 | 0.079 | 2.22 |
| Verbascoside | y = 64.22x − 557.92 | 0.9996 | 0.08 | 3.33 |