| | Compound | Regression equation | R2 | 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 |
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