Table 4.
Extraction parameters.
| Extraction Procedure | Extracted Material (Spruce Bark) | Solvent (Ethanol) | Temperature (°C) | Extraction Time (min) | Ultrasound/Microwave Power (W) | Ultrasound Frequency (kHz) |
|---|---|---|---|---|---|---|
| UAE | 1g | 70% | 65 | 30 | 240 | 40 |
| MAE | 2g | 50% | - | 4 | 300 | - |
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