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Open Chemistry

formerly Central European Journal of Chemistry

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Volume 4, Issue 2


Volume 13 (2015)

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

Zhivka Simeonova / Kiril Gavazov / Alexander Alexandrov
Published Online: 2006-06-01 | DOI: https://doi.org/10.2478/s11532-006-0011-7


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 λ max=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.

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

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About the article

Published Online: 2006-06-01

Published in Print: 2006-06-01

Citation Information: Open Chemistry, Volume 4, Issue 2, Pages 258–265, ISSN (Online) 2391-5420, DOI: https://doi.org/10.2478/s11532-006-0011-7.

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© 2006 Versita Warsaw. This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License. BY-NC-ND 3.0

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