Simultaneous Determination of Three Bioactive Constituents from Bletilla striata by UPLC-MS/MS and Application of the Technique to Pharmacokinetic Analyses

Table 2

Typical equations for calibration curves and lower limit of quantification (LLOQ) (n = 3).

Analytes	Calibration curves	Linear range (μg/mL)	R^2	LLOQ (μg/mL)
α-Isobutylmalic acid	Y = 0.3148X + 0.0072	0.029∼110.33	0.9992	0.029
Gymnoside I	Y = 0.333X − 0.0002	0.022∼27.50	0.9994	0.022
Militarine	Y = 0.2126X − 0.0001	0.015∼99.33	0.9991	0.015