Table 2.

Calibration curve data for four reference compounds (n = 3).

Analytes∗	Regression equation	R 2	Linear range (μg/ml)	LOD (μg/ml)	LOQ (μg/ml)
1	Y = 32527X − 17514	R 2 = 0.9993	0.84-84	0.02	0.07
2	Y = 37321X − 3879.4	R 2 = 0.9990	0.88-88	0.01	0.05
3	Y = 48267X − 137446	R 2 = 0.9991	1.81-90	0.04	0.14
4	Y = 56440X − 1223.9	R 2 = 0.9992	0.77-77	0.01	0.04

^∗1: baicalin, 2: wogonoside, 3: baicalein, and 4: wogonin.