Table 2.
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 |
*Source A: birch bark collected in April 2010 from Ponoarele, Mehedinţi, Romania.
*Source B: birch bark collected in April 2010 from Aninei Mountains, Romania.