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. 2022 Jun 9;13:893552. doi: 10.3389/fphar.2022.893552

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