Table 3 Linear regression equation, linear ranges, LODs, and LOQs
Compounds | Regression equation | Linear ranges (μg/mL) | r | LOD (μg/mL) | LOQ (μg/mL) |
|---|---|---|---|---|---|
Protocatechuic acid | y = 24.468x − 0.078 | 0.62–36.90 | 1.0000 | 0.040 | 0.102 |
Neochlorogenic acid | y = 16.211x + 1.285 | 0.65–39.00 | 0.9999 | 0.059 | 0.149 |
Cryptochlorogenic acid | y = 15.700x − 2.045 | 0.70–42.00 | 1.0000 | 0.041 | 0.126 |
Chlorogenic acid | y = 16.345x − 2.202 | 0.54–32.40 | 1.0000 | 0.047 | 0.134 |
Sweroside | y = 14.224x + 0.310 | 0.59–35.10 | 1.0000 | 0.086 | 0.201 |
Strictosamide | y = 16.580x − 0.526 | 2.45–147.00 | 1.0000 | 0.077 | 0.275 |
Vincosamide | y = 17.197x − 0.580 | 0.64–38.10 | 0.9995 | 0.039 | 0.098 |