Research Article

Antioxidant, Antiglycation, and Hypoglycaemic Effect of Seriphium plumosum Crude Plant Extracts

Table 1

Test for the presence of phytochemicals.

PhytoconstituentTestObservation

Tannins (Braymer’s Test)2 ml extract + 2 ml H2O + 2-3 drops of FeCl3 (5%)Green precipitate
Flavonoids1 ml extract + 1 ml Pb(OAc)4 (10%)Yellow colouration
Phenols2 ml extract 2 ml of 2% FeCl3Blue/black colouration
Saponins(a) 5 ml extract + 5 ml H2O + heatFroth appears
(b) 5 ml extract + olive oil (few drops)Emulsion forms
Steroids (Salkowski Test)2 ml extract + 2 ml CHCl3 + 2 ml H2SO4 (conc.)Reddish brown ring at the junction
Phlobatannins (Precipitate Test)2 ml extract + 2 ml HCl (1%) + heatRed precipitate
Glycosides (Liebermann’s Test)2 ml extract + 2 ml CHCl3 + 2 ml CH3COOHViolet to blue to green colouration
Coumarins2 ml extract + 3 ml NaOH (10%)Yellow colouration
Proteins (Xanthoproteic Test)1 ml extract + 1 ml H2SO4 (conc.)White precipitate
Anthraquinones (Borntrager’s Test)3 ml extract + 3 ml benzene + 5 ml NH3 (10%)Pink, violet, or red colouration in ammonical layer
Anthocyanins2 ml extract + 2 ml HCl (2N) + NH3Pinkish red to bluish violet colouration
Leucoanthocyanins turns5 ml extract + 5 ml isoamyl alcoholOrganic layer into red
Carbohydrates2 ml extract + 2 ml iodineA dark blue or deep purple colouration