Central European Journal of Chemistry

, Volume 4, Issue 2, pp 258–265 | Cite as

Extraction-spectrophotometric study on the vanadium(V)-2,3-dihydroxynaphthalene — iodonitrotetrazolium chloride — water — chloroform system and its analytical application

  • Zhivka J. Simeonova
  • Kiril B. Gavazov
  • Alexander V. Alexandrov
Research Article


The formation of a new ternary ion-associate complex of vanadium(V) with 2,3-dihydroxynaphthalene and iodonitrotetrazolium chloride with a composition ratio of 1:2:1 is reported. The complex is quantitatively extracted from water into chloroform. The molar absorptivity (ɛ) of the extract at λmax=340 nm is 2.5 × 104 dm3/mol cm, and Beer’s law is obeyed for concentrations ranging from 0.1 to 0.9 µg/cm3 V(V). The following constants are determined: the extraction constant, the association constant, the distribution constant, and the recovery factor. The effects of foreign ions and reagents are studied. A selective and sensitive method is developed for determination of vanadium in steels.


Vanadium(V) ion-associate complex 2,3-dihydroxynaphthalene iodonitrotetrazolium chloride extraction-spectrophotometric determination steel 


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Copyright information

© Versita Warsaw and Springer-Verlag Berlin Heidelberg 2006

Authors and Affiliations

  • Zhivka J. Simeonova
    • 1
  • Kiril B. Gavazov
    • 1
  • Alexander V. Alexandrov
    • 1
  1. 1.Department of General and Inorganic ChemistryPlovdiv UniversityPlovdivBulgaria

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