Selective Membrane Electrode for Bromide Ion Based on Aza Pyrilium Ion Derivative as a new Ionophore.

Subject Areas : Journal of Physical & Theoretical Chemistry

Hossein Aghaie ¹ , Karim Zare ² , Ali Reza Abedin ³ , Mehran Aghaie ⁴

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Received: 2015-04-24 Accepted : 2015-04-24 Published : 2004-05-01

Keywords: Bromide selective electrode, PVC membrane, Azapyrilium salt,

Abstract :

A highly selective electrode for Bromide ion based on aza pyrilium derivative as an excellentionophore is described.The sensor exhibits a good linear response with a slope of ( 60±1 ) mV per decadeover the concentration range of ( 1×10-3 9×10-6 M ) , and a detection limit of ( 3×10-6 M ) of Bromideions .The electrode response is independent of pH in the range of(4.0 9.5).Selectivity coefficientsdetermined by the matched potential method ( MPM ) . Indicate that the interference from inorganic andorganic anions is negligible. The proposed sensor shows a fast response time of approximately (20 s).Ithas been used as an indicator electrode in titration of Bromide with Ag +.