Open Access
Table 1
Regression equations of the investigated compounds, including the coefficient of determination (R2), range of calibration, LOD and LOQ.
| Compounds | Regression equation | R 2 | Range (mg/L) | LOD (mg/L) | LOQ (mg/L) |
|---|---|---|---|---|---|
| Hydroxytyrosol |
y = 5871 x + 12 |
0.9997 | 20–100 | 8.5 | 25.76 |
| Catechin hydrate |
y = 2740 x + 3 |
0.9998 | 50–200 | 4.74 | 14.38 |
| Tyrosol |
y = 3969 x + 3 |
0.9995 | 25–100 | 3.59 | 10.89 |
| p-hydroxybenzoic |
y = 8637 x + 2 |
0.9997 | 10–50 | 1.59 | 4.85 |
| Luteolin-7-rutinoside |
y = 8337 x + 10 |
0.9998 | 50–250 | 6.12 | 18.55 |
| Verbascoside |
y = 6089 x + 6 |
0.9998 | 100–250 | 6.86 | 20.79 |
| Luteolin-7-glucoside |
y = 11239 x + 8 |
0.9997 | 20–100 | 2.78 | 8.42 |
| Apigenin-7-glucoside |
y = 13916 x + 8 |
0.9998 | 20–100 | 2.29 | 6.95 |
| Oleuropein |
y = 6210 x + 20 |
0.9997 | 100–500 | 13.43 | 40.70 |
| Quercetin |
y = 10950 x + 1 |
0.9996 | 5–20 | 0.63 | 1.91 |
| Pinoresinol |
y = 7193 x + 3 |
0.9995 | 20–100 | 2.03 | 6.16 |
| Apigenin |
y = 3990 x + 3 |
0.9996 | 20–100 | 3.17 | 9.61 |
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