Table 2.

Calibration curve equations, linearity correlation coefficients, LOD values and LOQ values for the marker compounds.

Compound	Range (μg/mL)	Linear equation	Correlation coefficient	LOD (μg/mL)	LOQ (μg/mL)
Magnoflorine	0.2–100	y = 0.0402x − 0.0161	0.9990	0.01	0.05
Sinomenine	0.2–100	y = 0.0090x − 0.0024	0.9989	0.05	0.17
Isosinomenine	0.2–100	y = 0.0056x − 0.0036	0.9995	0.05	0.20
Syringaresinol	0.2–100	y = 0.0221x + 0.0021	0.9981	0.03	0.10
Fangchinoline	0.2–100	y = 0.0885x − 0.0411	0.9998	0.03	0.10
Aristolochic acid І	0.2–100	y = 0.0311x − 0.014	0.9982	0.01	0.05
Tetrandrine	0.2–100	y = 0.0511x + 0.0786	0.9982	0.02	0.07