Phytochemicals | Names of the tests | Expected changes | Results |
---|---|---|---|
Alkaloids | Mayer’s test | Yellowish buff color precipitate | + |
Hager’s test | Yellow crystalline precipitate | – | |
Wagner’s test | Brown or deep brown precipitate | + | |
Dragendorff’s test | Orange or orange-brown precipitate | + | |
Tannic acid test | Buff color precipitate | + | |
Tannins | Ferric chloride test | Blue green color | + |
Alkaline reagent test | Yellow to red precipitate | + | |
Glycosides | General test | Yellow color | + |
Test for glucoside | Production of brick-red precipitation | + | |
Carbohydrates | Molisch’s test | A red or reddish violet ring is formed at the junction of two layers, and on shaking a dark purple solution is formed | + |
Barfoed’s test (general test for monosaccharides) | Red precipitate | + | |
Fehling’s test | A red or brick-red precipitate | + | |
Test for reducing sugar | A brick-red precipitate | + | |
Flavonoids | Hydrochloric acid reduction test | Red color | + |