Journal of Analytical Chemistry

, Volume 72, Issue 7, pp 734–738 | Cite as

Color reactions of vanadium(V) with 8-hydroxyquinoline-5-sulfonic acid and ascorbic acid on PANV–AV-17 disks

  • O. P. Shvoeva
  • V. P. Dedkova
  • A. A. Grechnikov


The adsorption of vanadium(V) and 8-hydroxyquinoline-5-sulfonic acid (HQS) on polyacrylonitrile fiber disks filled with an AV-17 (PANV–AV-17) anion exchanger is studied by diffuse reflection spectroscopy. Vanadium(V) at pH 5‒7 is adsorbed on PANV–AV-17; when a HQS solution is applied to the disk, a yellowish green complex compound formed, which changed color to almost black after the treatment of the disk with a HCl solution. The presence of sulfo groups in the HQS molecule ensures the preconcentration of the reagent on PANV–AV-17 disks with the registration of an analytical signal after the treatment of the disk with NaVO3 and 0.1 M HCl solutions. A linear dependence of the analytical signal is observed in the HQS concentration range of 1‒10 μg/mL. The presence of 20-fold amounts (by weight) of 8-hydroxyquinoline (HOQ) does not interfere with the determination. When ascorbic acid is applied to the disk with a vanadium(V)‒HQS‒HCl complex, the color changes from black to green. A test method for the determination of ascorbic acid is proposed. 8-Hydroxyquinoline can be determined by the intrinsic color of the adsorbate on PANV–KU-2 in the range of concentrations of HOQ solution in two drops 5‒100 μg.


diffuse reflection spectroscopy vanadium PANV–AV-17 PANV–KU-2 8-hydroxyquinoline 8-hydroxyquinoline-5-sulfonic acid ascorbic acid 


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Copyright information

© Pleiades Publishing, Ltd. 2017

Authors and Affiliations

  • O. P. Shvoeva
    • 1
  • V. P. Dedkova
    • 1
  • A. A. Grechnikov
    • 1
  1. 1.Vernadsky Institute of Geochemistry and Analytical ChemistryRussian Academy of SciencesMoscowRussia

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