Basic Chemical Tests for Plant Extracts Flashcards
preliminary tests conducted to detect the presence of both primary and secondary metabolites in an extract
Phytochemical Screening
An orange red precipitate indicates the presence of alkaloids.
Dragendorff’s test
The appearance of reddish brown precipitate signifies the existence of alkaloids.
Wagner’s test
The appearance of whitish or cream precipitate implies the presence of alkaloids.
Mayer’s test
The formation of yellow-colored precipitate indicates the presence of alkaloids.
Hager’s test
Test for alkaloids
Dragendorff’s test, Wagner’s test, Mayer’s test, Hager’s test
Test for glycosides
Bontrager’s test, Legal’s test, Keller Killiani test
The appearance of pink color indicates the presence of anthraquinone glycosides.
Bontrager’s test
The formation of pink to blood red precipitate signifies the
existence of cardiac glycoside.
Legal’s test
The emergence of reddish brown layer that turns bluish green implies the presence of digitoxose.
Keller Killiani test
Test for phytosterols
Libermann Burchard test, Salkowski test
The formation of violet to blue-colored ring at the junction of two liquids indicate the presence of steroids.
Libermann Burchard test
The development of golden-yellow precipitate indicates the presence of triterpenes.
Salkowski test
The emerald green color indicates the prese of diterpenes.
Copper acetate test
The formation of white precipitate indicates the presence of tannins.
Gelatin test
