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Quantification of total polyphenols, total flavonoids and antioxidant activity (IC50) of aqueous alkaloid-free extract and its fractions.
| Extract/fraction | Polyphenols (%) | Flavonoids (%) | Antioxidant activity CI50 ( μ g/mL) |
|---|---|---|---|
| Aqueous alkaloid-free extract | 6.33 | 2.37 | 120.54 |
| Aqueous fraction | 1.86 | 0.67 | 181.08 |
| Organic fraction | 3.60 | 1.52 | 140.36 |
| Precipitate | 1.20 | 0.67 | 300.15 |
Polyphenols (%) based on mgGAE/100 mg of sample. Flavonoids (%) based on mgCTE/100 mg.
