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Current Topics in Electrochemistry   Volumes    Volume 16 
Application of polypyrrole for potentiometric titration of halides
Reza Ansari, Fatemeh Emsakpour, Majid Arvand, Ali Mohammad-Khah
Pages: 15 - 23
Number of pages: 9
Current Topics in Electrochemistry
Volume 16 

Copyright © 2011 Research Trends. All rights reserved

This paper describes a potentiometric titration using a modified pencil graphite electrode with polypyrrole (PGE/PPyCl) for determination of halides at low concentrations (ppm). This indicator electrode was prepared using a pencil graphite electrode coated with a thin polypyrrole conducting polymer film and its recognition property for halides was investigated. The polypyrrole (PPy) film was prepared by the electropolymerization of pyrrole monomer in the presence of NaCl as supporting electrolyte using a pencil graphite electrode (PGE) as working electrode. The PGE/PPyCl electrode was then used as indicator electrode for determination of halide ions via potentiometric precipitation titration with silver ion. The titration curves were compared with those obtained by a normal silver wire indicator electrode. It was found that using PGE/PPyCl provides higher precision and lower detection limit in measurement of halide ions.
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