Table 2.
Regression equation and correlation coefficient for rhynchophylline, isorhynchophylline, corynoxeine, isocorynoxeine, hirsutine, and hirsuteine in mouse blood (y = peak area ratio of the analyte versus IS; x = concentration of the analyte).
| Compound | Linear range (ng/mL) | Regression equation | Correlation coefficient |
|---|---|---|---|
| Rhynchophylline | 1-1000 | y = 0.0082x − 0.0021 | 0.9988 |
| Isorhynchophylline | 1-1000 | y = 0.0043x + 0.0021 | 0.9972 |
| Corynoxeine | 1-1000 | y = 0.0049x + 0.0002 | 0.9990 |
| Isocorynoxeine | 1-1000 | y = 0.0131x − 0.0125 | 0.9992 |
| Hirsutine | 1-1000 | y = 0.0019x + 0.0012 | 0.9976 |
| Hirsuteine | 1-1000 | y = 0.0016x − 0.0010 | 0.9960 |