Table 1.
Analysis via ultra-high performance liquid chromatography (UHPLC) of phenolic compounds in feed and MD retentate samples. Data are expressed as the means ± relative standard deviation (RSD) of three independent observations.
| Compound | Feed | MD Retentate |
|---|---|---|
| (mg/L) | (mg/L) | |
| Caffeic acid | 6.0 ± 0.3 | 25.9 ± 1.2 |
| p-Coumaric acid | 0.9 ± 0.01 | 5.4 ± 0.4 |
| Ferulic acid | 3.8 ± 0.4 | 21.2 ± 0.5 |
| 4-Hydroxyphenlyl acetate | 8.5 ± 0.9 | 44.9 ± 2.5 |
| Hydroxytyrosol | 367.7 ± 3.6 | 1902.9 ± 7.6 |
| Oleuropein | 35.2 ± 2.4 | 235.2 ± 2.0 |
| Tyrosol | 41.0 ± 2.0 | 257.9 ± 3.5 |
| Vanillic acid | 1.0 ± 0.3 | 5.5 ± 0.4 |
| Verbascoside | 49.0 ± 1.8 | 271.8 ± 2.5 |