Table 5 Summary of data used to quantify major components of QEF8 by HPLC method
Compound | Regression equation | R 2 | Linear range (μg/mL) | LOD (μg/mL) | Content (%) |
|---|---|---|---|---|---|
GA | y = 12.285 × − 8.215 | 0.9997 | 3.91–31.25 | 0.76 | 0.60 ± 0.03 |
EGC | y = 1.112 × − 8.101 | 0.9998 | 54.69–437.50 | 9.59 | 0.55 ± 0.23 |
C | y = 2.214 × − 2.175 | 0.9998 | 9.38–75.00 | 1.34 | 1.29 ± 0.15 |
EGCG | y = 7.721 × − 107.250 | 0.9989 | 62.50–500.00 | 24.05 | 30.94 ± 0.45 |
GCG | y = 1.530 × − 4.051 | 0.9999 | 25.00–200.00 | 3.42 | 2.74 ± 0.20 |
EC | y = 20.066 × − 33.854 | 0.9987 | 9.38–75.00 | 3.84 | 1.18 ± 0.02 |
ECG | y = 9.056 × − 30.433 | 0.9995 | 18.75–150.00 | 4.9 | 10.61 ± 0.15 |
CG | y = 8.725 × − 8.939 | 0.9993 | 4.69–37.50 | 1.40 | 0.53 ± 0.04 |