Qualitative Tests (Flavonoid glycosides)

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Flavonoid glycosides

Last updated 5:11 PM on 9/4/26
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4 Terms

1
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Wilstatter “Cyanidin” Test

  • Uses HCl

  • Presence of GAMMA BENZOPYRONE NUCLEUS

  • Result: orange to red to crimson & magenta occasionally green/blue


2
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Bate-smith and Metcalf Test

  • Immediate red = presence of chalcones & aurones

  • if no color is produced, boil sample;

    • Intense (+) red/violet = leucoanthocyanins


3
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Test for Anthocyanins

  • Extract with 1% HCl then boil

  • (+) at boiling point, an orange red to blue red coloration


4
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