TABLE 6.
Regression equation and linear range of the standard curve of tetramethylpyrazine, ferulic acid, nodakenin, and isoimperatorin in rabbit plasma.
| Component | Regression equation | r | Linear range (ng/ml) | Detection limit (ng/ml) | Quantitative limit (ng/ml) |
|---|---|---|---|---|---|
| Tetramethylpyrazine | Y = 542.07 X+ 4,119.40 | 0.9994 | 1.7425–69.7000 | 0.5158 | 1.7193 |
| Ferulic acid | Y = 1,449.20 X–36,481.00 | 0.9999 | 9.6625–4,831.2500 | 1.2368 | 4.1227 |
| Nodakenin | Y = 4,097.90 X–3,191.40 | 0.9998 | 1.0275–205.5000 | 0.3425 | 1.1417 |
| Isoimperatorin | Y = 859.24 X–556.05 | 0.9996 | 3.3200–166.0000 | 2.3000 | 7.6667 |