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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 23, Number 1
BKCSDE 23(1)
January 20, 2002 

A New PVC-Membrane Electrode Based on a Thia-Substituted Macrocyclic Diamide for Selective Potentiometric Determination of Silver Ion
Mojtaba Shamsipur, Sayed Yahya Kazemi, Khodabaksh Niknam, Hashem Sharghi
Ag+-selective electrode, PVC-membrane, Macrocylic diamide, Potentiometry.
A new PVC-membrane electrode for Ag+ ion based on a thia-substituted macrocyclic diamide has been prepared. The electrode exhibited a Nernstian response for Ag+ over a wide concentration range (1.7 ×10 -6 -1.0 ×10-1 M). It has a response time < 15 s and can be used for at least 3 months without divergence. The proposed membrane sensor revealed good selectivities for Ag+ over a variety of metal ions and can be used in a pH range 3.0-7.5. It has been used successfully for direct determination of Ag+ in different real samples and, as an indicator electrode, in the titration of silver ion.
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