Investigation of the uranil(II)—3-Hydroxyflavone complex

  • Dušan Malešev
  • Zorica Radović
  • Milena Jelikić-Stankov
Anorganische Und Physikalische Chemie


By the application of suitable spectrophotometric methods andpH-metric measurements it has been established that uranyl ion and 3-hydroxyflavone form a [UO2(C15H9O3)]+ complex. The concentration stability constant of the complex was determined by Bent-French's (β1=8.59 atpH=3.5) and Bjerrum's (from 8.68 atpH=4 to 6.14 atpH=7) methods. Conditions are given for the spectrophotometric determination of 3-hydroxyflavone by means of the complex. The regression equation is calculated and the accuracy of the method is determined. All investigations were carried out with 80% ethanolic solutions at room temperature (20°), the spectrophotometric measurements being performed at a constantpH (3.5) and a constant ionic strength (0.01M).


Spectrophotometric methods pH-metry 3-Hydroxyflavone Uranyl(II) nitrate 

Untersuchung des Uranil(II)—3-Hydroxyflavon-Komplexes


Unter der Anwendung von geeigneten spektrophotometrischen Methoden sowiepH-metrischen Messungen wurde gefunden, daß das UO 2 2+ -Ion und 3-Hydroxyflavon den Komplex [UO2(C15H9O3)]+ bilden. Die Stabilitätskonstante des Komplexes wurde nach Bent und French (β1=8.59 beipH=3.5) und nach Bjerrum (von 8.68 beipH=4 bis 6.14 beipH=7) bestimmt. Es werden die Bedingungen für die spektrophotometrische Bestimmung des 3-Hydroxyflavons mit Hilfe des Komplexes angegeben, die Regreßgleichung berechnet und die Genauigkeit der Methode ermittelt. Alle Untersuchungen wurden in 80proz. Ethanol bei Raumtemperatur (20°), die spektrophotometrischen Untersuchungen bei konstantempH-Wert und Ionenstärke (0.01M) durchgeführt.


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Copyright information

© Springer-Verlag 1990

Authors and Affiliations

  • Dušan Malešev
    • 1
  • Zorica Radović
    • 1
  • Milena Jelikić-Stankov
    • 1
  1. 1.Institute of Physical ChemistryFaculty of PharmacyBeogradYugoslavia

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