Table 5.
Polyphenolic composition of olive leaves powders OLP1 and OLP2 after extraction, membrane purification, under vacuum concentration, and final dryer procedure.
| Compound(s) | OLP1 | OLP 2 |
|---|---|---|
| mg/g | mg/g | |
| Hydroxytyrosol glucoside | 2.6 ± 0.1 | 1.31 ± 0.05 |
| Hydroxytyrosol | 1.02 ± 0.04 | nd |
| Demethyl elenolic acid diglucoside | (1.53 ± 0.06) × 10 | (1.03 ± 0.04) × 10 |
| Caffeic acid derivative | 2.21 ± 0.09 | nd |
| Verbascoside | 6.3 ± 0.2 | 3.0 ± 0.1 |
| Luteolin 7-O-glucoside | 3.6 ± 0.1 | 1.84 ± 0.07 |
| Oleuropein | (3.5 ± 0.2) × 102 | (2.40 ± 0.09) × 102 |
| Oleuropein aglycone | (2.9 ± 0.1) × 10 | 2.5 ± 0.1 |
| Total polyphenols | (4.1 ± 0.2) × 102 | (2.6 ± 0.1) × 102 |
nd, not detected.