Development of Simultaneous Analysis of Thirteen Bioactive Compounds in So-Cheong-Ryong-Tang Using UPLC-DAD

Table 1

Regression data, LODs, and LOQs for the marker compounds analyzed by UPLC.

	Compound	Regression equation	R^2	LOQ (µg/mL)	LOD (µg/mL)
1	Ephedrine	y = 6,569.4x − 2,539.7	0.9996	0.070	0.233
2	Methyl gallate	y = 49,631x − 14,901	0.9995	0.007	0.026
3	Catechin	y = 28,138x − 4,098.4	0.9992	0.008	0.029
4	Albiflorin	y = 6,199.8x − 2,341.7	0.9996	0.040	0.134
5	Paeoniflorin	y = 8,506.1x − 1,169.5	0.9994	0.018	0.062
6	Benzoic acid	y = 30,844x − 11,922	0.9995	0.021	0.070
7	Liquiritin	y = 19,772x − 3,660	0.9995	0.017	0.056
8	Liquiritin apioside	y = 15,249x − 1,630.9	0.9996	0.145	0.483
9	1,2,3,4,6-Pentagalloyl glucose	y = 29,863x − 17,029	0.9994	0.009	0.031
10	Cinnamic acid	y = 25,479x − 5,716.6	0.9994	0.008	0.027
11	Glycyrrhizin	y = 3,546.4x − 422.55	0.9994	0.073	0.244
12	Schisandrin	y = 86,584x − 4,328.7	0.9995	0.001	0.004
13	6-Shogaol	y = 1,025.4x + 1,176.6	0.9988	0.360	1.200

R² = correlation coefficient; y = peak area; x = sample concentration (µg/mL).