Chemistry of Natural Compounds

, Volume 11, Issue 6, pp 741–743 | Cite as

Ultraviolet absorption of flavonoids VIII. Ionization constants of kaempferol and quercetin

  • N. A. Tyukavkina
  • N. N. Pogodaeva


The ionization constants of the 4′- and 7-OH groups in quercetin and of the 3-, 4′-, 5′-, and 7-OH groups in kaempferol have been determined by the spectrophotometric method. The sequence of their ionization has been established.


Flavonoid Quercetin Flavone Hydroxy Group Kaempferol 


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Copyright information

© Plenum Publishing Corporation 1976

Authors and Affiliations

  • N. A. Tyukavkina
  • N. N. Pogodaeva

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