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. 2017 Dec 28;12:638. doi: 10.1186/s11671-017-2399-8

Table 2.

Phytochemical screening analysis

Test for phytochemicals Amount of plant extract Chemicals used End point for confirmation of phytochemical
Carbohydrate 2 mL Few drops of concentrated sulfuric acid and 1 mL of Molisch’s reagent Reddish or purple color
Tannins 2 mL 4 mL of 5% ferric chloride Greenish black or dark blue color
Saponins 2 mL 2 mL of distilled water and shake for 15 min Layer of foam on surface
Flavonoids 2 mL 1 mL of 2 N sodium hydroxide Yellow color
Alkaloids 2 mL Few drops of Mayer’s reagent and 2 mL of concentrated HCl White precipitate or green color
Anthraquinone 1 mL Few drops of 10% ammonia solution Pink color precipitates
Anthocyanosides 1 mL of filtrate 5 mL HCl Pale pink color