Table 2 Extraction of active principles from the birch bark
Mass of birch bark (Source) | Extraction solvent | Aspect of extract | Resulting samples |
|---|---|---|---|
15 g (A) | 2-Propanol (400 mL) | Cream-colored solution + white crystals deposited at the bottom of the flask | The white crystals: sample 1 pp |
Evaporation of solution and filtration: sample 1 | |||
15 g (A) | Ethanol (96% v/v) (400 mL) | Cream-colored solution | Evaporation of solution and filtration: sample 2 |
15 g (B) | 2-Propanol (400 mL) | Cream-colored solution + white crystals | The white crystals: sample 3 pp |
Evaporation of solution and filtration: sample 3 | |||
15 g (B) | Ethanol (96% v/v) (400 mL) | Cream-colored solution | Evaporation of solution and filtration: sample 4 |