Table 1 Conditions of preparation of different propolis extracts
Sample | Composition | Extraction temperature | Extraction time | Total amount of phenolic compounds mg/mL GAE |
|---|---|---|---|---|
W1 | Propolis 10 g; Water ad 100 mL | Room temperature | 5 h | 1.6 ± 0.4 * |
W2 | Propolis 10 g; PEG 400 20 g; Water ad 100 mL | 70° C | 15 min. | 10.7 ± 1.2 |
A1 | Propolis 10 g; Olive oil ad 100 mL; | Room temperature | 5 h | 0.5 ± 0.2 * |
A2 | Propolis 10 g; PEG 400 20 g; Olive oil 50 g; Water ad 100 mL | 70° C | 15 min. | 9.5 ± 1.3 |
EEP | Propolis 10 g; ethanol 70 % ad 100 mL | Room temperature | 5 h | 12.7 ± 1.2 |