Author/Authors :
Mosayebzadeh، Zahra نويسنده Chemistry Department, Faculty of science, University of Guilan, P.O.Box: 41635-1914,Rasht, Iran , , Ansari، Reza نويسنده , , Mohammad-khah ، Ali نويسنده Chemistry Department, Faculty of Science, University of Guilan, Rasht, Iran. Postal Code 41635-1911 , , Arvand، Majid نويسنده Department of Chemistry, Faculty of Science, University of Guilan, Namjoo Street, P.O. Box: 1914, Rasht, Iran ,
Abstract :
A solid state copper electrode is reported based on polypyrrole conducting
polymer film doped with Ponceau 4R azo dye. The sensing film was prepared in aqueous
solution via electropolymerization of pyrrole (10.0 mM) and Ponceau 4R azo dye (2.0 mM)
as ionophore, potentiostatically (Eapp.=0.80 V vs. SCE) using pencil graphite as working
electrode. The structural characteristics of the prepared copper electrode were studied by
scanning electron microscopy, Fourier transform infrared and energy dispersive
spectroscopy. The fabricated electrode showed a linear Nernstian response over the range of
1.0×10-5 to 5.0×10-2 M with slope of 29.28±0.20 mV per decade over the pH range of 4-6.
The sensor shows a fast response time ( < 15 s), good shelf lifetime and reasonably high
selectivity with respect to many cations including alkali, alkaline earth, and transition metal
ions. A detection limit of 6.70 ?M was obtained.
