Table 3 Calibration curves, LOD and LOQ data of investigated compounds by HPLC-DAD
Analytes | Calibration curvesa | r 2 | Linear range (μg/mL) | LOD (μg/mL) | LOQ (μg/mL) |
|---|---|---|---|---|---|
Gallic acid | Y = 2.4 × 106X-8022.9 | 0.9999 | 148.0-1480.0 | 7.5 | 14.1 |
Protocatechuic acid | Y = 8.0 × 106X-36350 | 0.9994 | 38.4-384.0 | 8.6 | 19.2 |
Vanillic acid | Y = 2.6 × 106X-18490 | 0.9997 | 32.0-320.0 | 5.0 | 10.0 |
Caffeic acid | Y = 3.5 × 106X-25506 | 1.0000 | 35.6-356.0 | 6.5 | 13.6 |
Paeoniflorin | Y = 1.1 × 106X + 160000 | 0.9990 | 476.0-4760.0 | 24.8 | 59.6 |
Ferulic acid | Y = 1.1 × 107X-1.2 × 105 | 0.9997 | 136.0-1360.0 | 6.2 | 12.4 |
Senkyunolide I | Y = 6.5 × 106X-9533.5 | 0.9999 | 46.0-460.0 | 6.3 | 12.6 |