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The retention time of phenolic compounds at 290 nm.
| Number | Standard | Retention time (Rt) min |
|---|---|---|
| 1 | Chlorogenic acid | 7.406 |
| 2 | Caffeine | 7.846 |
| 3 | Caffeic acid | 7.950 |
| 4 | Epicatechin | 8.417 |
| 5 | Catechin | 8.518 |
| 6 | Syringic acid | 8.639 |
| 7 | Rutin | 11.196 |
| 8 | trans-Ferulic acid | 11.326 |
| 9 | Hesperidin | 13.164 |
| 10 | Quercetin | 15.262 |
| 11 | trans-Cinnamic acid | 16.126 |
| 12 | Naringenin | 16.583 |
| 13 | Kaempferol | 16.920 |
