Assessment of the Aromatase Inhibitory Activity of Ma-Huang-Tang (MHT) and Its Active Compounds

Table 6

Linearity, LOD, and LOQ of the four standard compounds.

Compounds	tR (min)	Equation (linear model)^a	Linear range (mg/mL)	r^2b	LOD^c (μg/mL)	LOQ^d (μg/mL)
1	9.65	y = 10,999,847x + 12,569	0.001–0.4	0.9998	0.2507	0.7597
5	14.20	y = 15,200,231x − 3,254		1.000	0.5774	1.7497
6	14.49	y = 18,268,572x − 7,852		1.000	0.5259	1.5937
7	18.81	y = 28,501,213x + 12,569		1.000	0.1714	0.5195

^ay: peak area at 207 nm; x: standard concentration (mg/mL). ^br²: coefficient of determination with 11 indicated points on the calibration curves. ^cLOD: limit of detection, S/N = 3.3 (n = 7). ^dLOQ: limit of quantification, S/N = 10 (n = 7).