Table 2.

Regression equation, correlation coefficient, linear range, LOD, and LOQ of 10 components in UHPLC-QQQ-MS.

Analyte	Regression equation	Correlation Coefficient (R2)	Linear range (µg/mL)	LOD (ng/mL)	LOQ (ng/mL)
Puerarin	y = 181790.01 x + 29.65	0.9995	0.00774～2.048	1.12	3.93
Daidzin	y = 703318.66 x + 481.60	0.9992	0.00826～1.918	0.88	3.01
Coptisine	y = 926264.11 x – 1293.07	0.9998	0.00444～0.894	0.75	2.32
Epiberberine	y = 2870685.59 x + 965.63	0.9996	0.00174～0.471	0.25	0.86
Jatrorrhizine	y = 2719691.61 x – 352.51	0.9995	0.00323～0.906	0.50	1.73
Berberine	y = 2845616.29x – 1165.64	0.9994	0.00175～0.4775	0.31	1.15
Palmatine	y = 3200432.28 x – 521.16	0.9994	0.00175～0.487	0.28	0.90
Coumarin	y = 251481.47 x – 53.44	0.9998	0.00283～0.734	0.43	1.44
Daidzein	y = 120736.64 x + 16.89	0.9995	0.00112～0.3055	0.17	0.63
Cinnamic acid	y = 6148.94 x – 6.12	0.9996	0.01633～3.695	2.09	6.46

y: peak area of the components; x: concentration in µg/mL.