Journal of Applied Electrochemistry

, Volume 37, Issue 7, pp 853–859 | Cite as

Fabrication of a novel holmium(III) PVC membrane sensor based on 4-chloro-1,2-bis(2-pyridinecarboxamido)benzene as a neutral ionophore

  • Hassan Ali Zamani
  • Mohammad Reza Ganjali
  • Parviz Norouzi
  • Soraia Meghdadi
Original Paper


This paper introduces the development of an original PVC membrane electrode, based on 4-chloro-1,2-bis(2-pyridinecarboxamido)benzene (CBPB) as a suitable carrier for the Ho3+ ion. The electrode presents a Nernstian slope of 19.7 ± 0.3 mV per decade for the Ho3+ ions across a broad working concentration range from 1.0 × 10−6 to 1.0 × 10−2 M. The lower detection limit was 8.5 × 10−7 M in the pH range 2.7–9.8, while the response time was rapid (<15 s). Therefore, this potentiometric sensor displayed good selectivity for a number of cations such as alkali, alkaline earth, transition and heavy metal ions. The practical applicability of the electrode was demonstrated by its use as an indicator electrode in the potentiometric titration of Ho3+ ions with EDTA and in the determination of F- in mouth wash samples.


PVC membrane Holmium(III) ion-selective electrode Potentiometry 4-Chloro-1,2-bis(2-pyridinecarboxamido)benzene 



The authors are grateful to the Quchan University Research Council for financial support.


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Copyright information

© Springer Science+Business Media, Inc. 2007

Authors and Affiliations

  • Hassan Ali Zamani
    • 1
  • Mohammad Reza Ganjali
    • 2
    • 3
  • Parviz Norouzi
    • 2
    • 3
  • Soraia Meghdadi
    • 4
  1. 1.Department of Chemistry, Quchan branchIslamic Azad UniversityQuchanIran
  2. 2.Center of Excellence in ElectrochemistryUniversity of TehranTehranIran
  3. 3.Endocrine & Metabolism Research Center of Medical SciencesUniversity of TehranTehranIran
  4. 4.Department of ChemistryIsfahan University of TechnologyIsfahanIran

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