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Standard curve analysis for catechin, gallic acid and bergenin.
| Compound | Retention time (min) | Standard equation | R2 |
|---|---|---|---|
| Catechin | 9.43 ± 0.18 | y = 14331x − 78520 | 0.99 |
| Gallic acid | 3.97 ± 0.03 | y = 10949x + 90475 | 0.96 |
| Bergenin | 3.28 ± 0.03 | y = 1626x + 16757 | 0.99 |
