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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 26, Number 11
BKCSDE 26(11)
November 20, 2005 

 
Title
Novel Triiodide PVC-Based Membrane Sensor Based on a Charge Transfer Complex of Iodine and Bis(2-hydroxyacetophenone)butane-2,3-dihydrazone
Author
Mohammad Reza Ganjali*, Parviz Norouzi, Simindokht Shirvani-Arani, Masoud Salavati-Niasari
Keywords
Triiodide ion-selective electrode, PVC membrane, Bis(2-hydroxyacetophenone)butane-2,3-dihydrazone, Potentiometry
Abstract
In this study a novel triiodide ion-selective electrode based on a charge transfer complex of iodine and Bis(2-hydroxyacetophenone)butane-2,3-dihydrazone (ICT), as a membrane carrier was prepared. The electrode has a linear dynamic range between 1.0 × 10-2 and 5.0 × 10-7 M, with a Nernstian slope of 58. 99 ± 0.3 mV decade-1 and detection limit of 3.0 × 10-7 M. The potentiometric response of the proposed sensor is independent of the pH of the solution in the pH range of 3.0-10.0. The electrode possesses the advantages of short conditioning time, fast response time, and especially, very good selectivity over a large number of common organic and inorganic anions. The electrode can be used for at least 6 months without any considerable divergences in the potentials. It was used as an indicator electrode in potentiometric titration of triiodide ion with thiosulfate.
Page
1738 - 1742
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