Table 1.
Main results of the HPLC method.
| Medicinal Components | tR (min) | Standard Sample Range (mg/g) | Calibration Curve | r | Recovery (%, n = 3) | Sample Value Range (mg/g) |
|---|---|---|---|---|---|---|
| Echinacoside | 5.79 | 1.00–1000.00 | Y = 1.106 × 10−4X + 2.50 | 0.9998 | 98.5 | 6.50–535.45 |
| Verbascoside | 8.10 | 1.00–250.00 | Y = 8.100 × 10−5X + 0.03 | 0.9995 | 103.8 | 1.35–212.88 |
| Fructose | 12.50 | 1.00–250.00 | Y = 4.195 × 10−2X + 2.13 | 0.9999 | 100.5 | 13.36–104.78 |
| Mannitol | 14.70 | 1.00–100.00 | Y = 4.954 × 10−3X + 0.113 | 0.9990 | 99.6 | 12.52–88.70 |
| Glucose | 15.70 | 1.00–100.00 | Y = 1.857 × 10−2X + 0.104 | 0.9999 | 100.2 | 15.84–75.36 |
| Sucrose | 21.60 | 1.00–100.00 | Y = 6.816 × 10−3X + 0.156 | 0.9996 | 98.5 | 16.22–43.43 |