Table 2.
UPLC analyzed regression data, LODs, and LOQs for marker compounds (n = 4).
| Markers | Regression equation | R 2 | S D Y−intercept | LOD | LOQ |
|---|---|---|---|---|---|
| Caffeine | y = 39.99x + 566.94 | 0.9997 | 104.31 | 8.607431 | 26.08312 |
| Epicatechin | y = 88.47x + 518.53 | 0.9998 | 86.13 | 3.212644 | 9.735285 |
| Corilagin | y = 22.076x + 51.272 | 0.9999 | 12.65 | 1.89047 | 5.728697 |
| EGCG | y = 54.437x + 1858.7 | 0.9999 | 188.98 | 11.45625 | 34.71589 |
| ECG | y = 89.785x + 1021.7 | 0.9999 | 101.28 | 3.722341 | 11.27982 |
| Ellagic acid | y = 45.018x + 78.392 | 0.9999 | 44.46 | 3.258874 | 9.875376 |
Note:y: peak area; x: sample concentration (μg/mL); R2: correlation coefficients.
Abbreviations: LOD, limit of detection; LOQ, limit of quantification.