Class (74) = Flavonoid (Part 06) | Identification Test of Flavonoid | Qualitative test of Flavonoid

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Introduction to Flavonoids in Hindi by Solution Pharmacy    • Class (69)= Flavonoids (Part 01) | Introdu...  
Flavonoids Identification test
1. Ferric Chloride test: Plant extract was mixed with Ferric chloride solution- Dark green color formed.
2. Shinoda test: The plant extract was mixed with few drops of concentrated
HCl to this mixture, pieces of magnesium were added- Pink , red, yellow,or magenta color developed.
3. Zinc-HCl reduction test: Plant extract was mixed with concentrated HCl. To this mixture, zinc dust was added A magenta color developed.
4. Lead acetate test: Plant extract was mixed with 10% lead acetate solution- Yellow precipitate obtained.
5. Sodium hydroxide test: Plant extract was mixed with 10% NaOH solution- Yellow precipitate was formed.
6. To small quantity of residue, add lead acetate solution. Yellow coloured precipitate is formed.
7. Alkaline reagent test-Addition of increasing amount of sodium hydroxide to the residue show yellow coloration, which discoloration after addition of acid.

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