Table 2.
Phytochemical pre-screening of F. cirrhosa bulb extracts. The marks ‘+’ and ‘−’ indicate ‘present’ and ‘absent’, respectively.
| Tests | Inference extract | Petroleum ether | Ethyl acetate | Methanol |
|---|---|---|---|---|
| Carbohydrates | ||||
| Molish’s test | Violet ring | − | − | − |
| Fehling’s test | Brick red ppt | − | + | + |
| Benedict’s test | Red ppt | − | − | − |
| Selwinoff’s test | Pink colour | − | + | + |
| Tannins | ||||
| 5% FeCl3 | Yellow colour | − | + | + |
| Lead acetate | White ppt | − | − | − |
| Saponins | ||||
| Foam test | Foaming | + | + | + |
| Froth test | Frothing | + | + | + |
| Flavonoids | ||||
| Shinoda test | Pink colour | + | + | + |
| Phenolics | ||||
| 1% FeCl3 | Black-blue colour | + | + | + |
| Anthraquinone glycosides | ||||
| Borntrager’s test | Pink colour | − | − | − |
| Terpenoids | ||||
| Salkowski’s test | The golden yellow ring at the junction | + | + | + |
| Alkaloids | ||||
| Wagner’s test | Brown ppt | − | + | + |
| Dragendroff’s test | Orange ppt | − | + | − |
| Mayer’s test | Cream ppt | − | − | + |
| Wagner’s test | Yellow ppt | − | + | + |