Teat for flavonoids:
Three methods were used to determine the presence of flavonoids in the plant sample (Sofowara, 1993; Harbrone, 1973).
5 ml of dilute ammonia solution were added to a portion of the aqueous filtrate of each plant extract followed by addition of concentrated H2S04.
A yellow colouration observed in each extract indicated the presence of flavonoids.
The yellow colouration disappeared on standing