Table 2 Regression equations, linear ranges, correlation coefficients, and LLOQ of the tested compounds
Analyte | Linear range (ng/mL) | Calibration curves | r2 (n = 6) | LLOQ (ng/mL) |
|---|---|---|---|---|
Astragaloside IV | 1.48–14,800 | y = 0.4672x + 0.00004 | 0.9995 | 1.25 |
Cycloastragenol | 0.148–1480 | y = 0.1243x + 0.00002 | 0.9998 | 0.125 |
Calycosin-7-O-β-d-glucoside | 1.48–14,800 | y = 0.7575x + 0.0017 | 0.9999 | 1.25 |
Calycosin | 0.148–1480 | y = 4.836x + 0.038 | 0.9992 | 0.125 |
Ononin | 1.48–14,800 | y = 0.1166x + 0.0001 | 0.9994 | 1.25 |
Formononetin | 0.148–1480 | y = 3.0566x + 0.0042 | 0.9995 | 0.125 |