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Table 2 Qualitative analyses of the phytochemical components of Aloe vera extracts

From: Effect of climate change on phytochemical diversity, total phenolic content and in vitro antioxidant activity of Aloe vera (L.) Burm.f.

Phytochemical analysis Collection sites
Chemical constituents Test reagent Observation 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12.
Alkaloids Mayer’s reagent White ppt +++ +++ +++ +++ ++ ++ ++ ++ ++ ++ + ++
Glycosides 10% Lead acetate
solution
White ppt +++ ++ +++ ++ ++ +++ ++ +++ +++ ++ ++ ++
Reducing sugar Benedict’s solution Reddish brown ppt ++ ++ ++ +++ ++ ++ +++ ++ ++ +++ ++ +++
Phenolic compounds Ferric chloride solution Green colour +++ +++ +++ +++ ++ ++ ++ ++ ++ ++ ++ ++
Steroids and terpenoids Acetic anhydride and conc: H2SO4 Pink colour ++ ++ + ++ ++ + + + ++ + +++ ++
Flavonoids Benzene FeCl3 Yellow ppt +++ +++ +++ +++ ++ ++ +++ ++ ++ ++ ++ ++
Tannins FeCl3 and 10% lead acetate White ppt ++ ++ ++ ++ ++ + ++ ++ ++ + ++ +
Saponin glycosides Distilled water Frothing take place +++ +++ ++ ++ ++ ++ ++ ++ ++ ++ ++ ++
  1. +++ high, ++ medium, + low