Table 2 Results of preliminary tests of G. wallichianum.
Tests | Inference | Methanol | Ethanol | Ethyl acetate | Petroleum ether |
|---|---|---|---|---|---|
Carbohydrates | |||||
Molisch’s test | Violet ring | + | + | + | + |
Fehling’s test | Formation of yellow pot | + | − | + | − |
Benedict’s test | Red precipitate | + | + | + | + |
Anthraquinone glycosides | |||||
Anthraquinone glycosides | The ammoniacal layer turns pink | − | + | + | + |
Saponin glycosides | |||||
Foam test | Persistent foam | + | + | + | + |
Flavonoids | |||||
Shinoda test | Pink color appears | + | + | + | + |
Alkaline Reagent test | Concentrated yellow color | + | − | + | + |
Tannins and phenolics | |||||
FeCl3 test | Black color | + | + | + | + |
Lead acetate test | White precipitate | + | + | + | − |
Steroids | |||||
Salkowski reaction | Chloroform layer appears red | + | − | + | + |
Alkaloids | |||||
Mayer’s test | Formation of precipitate | − | − | + | + |
Dragendroff’s test | Organic precipitate | + | + | + | + |
Wagner’s test | Formation of radish brown precipitate | + | + | − | − |
Terpenoids | |||||
Terpenoid test | Grey color | + | + | + | + |
