Table 2.
Linear regression and contents of 10 compounds (n = 6).
| Peak No. | Rt (min) | Compounds | Regression equation | R2 | Linearity range (μg/mL) | Content (mg/g) | RSD (%) |
|---|---|---|---|---|---|---|---|
| 1 | 3.3 | ephedrine | y = 131 94x+37.738 | 0.999 7 | 2.00–50.0 | 1.19 | 1.64 |
| 2 | 7.1 | amygdalin | y = 669 3.6x-50.185 | 0.999 2 | 2.50–100 | 4.97 | 0.70 |
| 3 | 8.4 | sinapine | y = 133 0x+107.5 | 0.999 8 | 1.25–50.0 | 3.63 | 3.09 |
| 4 | 8.7 | hastatoside | y = 259 6.2x+94.754 | 0.999 9 | 1.00–100 | 5.04 | 3.47 |
| 5 | 9.8 | verbenalin | y = 554 2.7x+5.5247 | 0.999 9 | 1.00–100 | 4.49 | 3.89 |
| 6 | 13.7 | polydatin | y = 362 5.7x+1160 | 0.999 8 | 1.50–150 | 8.45 | 3.43 |
| 7 | 14.4 | liquiritin | y = 444 1.4x+119.17 | 0.999 8 | 0.50–50.0 | 3.40 | 3.15 |
| 8 | 17.1 | acteoside | y = 381 9.9x+317.12 | 0.999 9 | 0.50–50.0 | 3.46 | 2.13 |
| 9 | 18.8 | naringin | y = 233 5.8x+4000.1 | 0.999 9 | 10.0–1000 | 54.91 | 1.15 |
| 10 | 28.8 | glycyrrhizic acid | y = 444 2x+1227.1 | 0.999 9 | 1.00–100 | 4.80 | 1.42 |