Table 5.
Retention times (tR) for the investigated polyphenols.
| Peak No. | Phenolic Compound | tR ± SD (min) | Peak No. | Phenolic Compound | tR ± SD (min) |
|---|---|---|---|---|---|
| 1 | Caftaric acid * | 2.10 ± 0.06 | 10 | Rutin | 20.20 ± 0.15 |
| 2 | Gentisic acid * | 2.15 ± 0.07 | 11 | Myricetin | 20.70 ± 0.06 |
| 3 | Caffeic acid * | 5.60 ± 0.04 | 12 | Fisetin | 22.60 ± 0.15 |
| 4 | Chlorogenic acid * | 5.62 ± 0.05 | 13 | Quercitrin | 23.00 ± 0.13 |
| 5 | p-coumaric acid | 8.7 ± 0.08 | 14 | Quercetol | 26.80 ± 0.15 |
| 6 | Ferulic acid | 12.2 ± 0.10 | 15 | Patuletin | 28.70 ± 0.12 |
| 7 | Sinapic acid | 14.3 ± 0.10 | 16 | Luteolin | 29.10 ± 0.19 |
| 8 | Hyperoside | 18.60 ± 0.12 | 17 | Kaempferol | 31.60 ± 0.17 |
| 9 | Isoquercitrin | 19.60 ± 0.10 | 18 | Apigenin | 33.10 ± 0.15 |
* overlapping in UV detection, only qualitative analysis possible using MS detection; SD (standard deviation).