Table 3.
Calibration curve, LOD and LOQ of standards.
| Compounds | Regression Equation | r | Linear Range (μg/mL) |
LOD (μg/mL) |
LOQ (μg/mL) |
|---|---|---|---|---|---|
| 4-Caffeoylquinic acid | y = 2.384x + 0.1378 | 0.9993 | 6.413–410.4 | 0.05388 | 0.1796 |
| Vitexin | y = 10.70x + 0.0285 | 0.9996 | 0.2775–17.76 | 0.01281 | 0.04271 |
| Rutin | y = 6.293x + 0.0261 | 0.9993 | 0.7950–50.88 | 0.02228 | 0.07425 |
| Isoquercitrin | y = 9.22x + 0.1726 | 0.9995 | 1.500–96.0 | 0.01488 | 0.04959 |
| Kaempferol-3-O-rutinoside | y = 2.630x + 0.0231 | 0.9997 | 0.5450–34.88 | 0.05225 | 0.1742 |
| Astragalin | y = 11.86x + 0.1738 | 0.9991 | 0.4538–29.04 | 0.01046 | 0.03486 |