Author/Authors :
Marques de Oliveira، نويسنده , , I.A. and Risco، نويسنده , , D. and Vocanson، نويسنده , , F. and Crespo، نويسنده , , E. and Teixidor، نويسنده , , F. and Zine، نويسنده , , N. and Bausells، نويسنده , , J. and Samitier، نويسنده , , J. and Errachid، نويسنده , , A.، نويسنده ,
Abstract :
Planar sodium-selective potentiometric microelectrodes with a conducting polymer (polypyrrole doped with cobaltabis(dicarbollide) ions ([3,3′-Co(1,2-C2B9H11)2]−)) as solid contact layer between the polymeric sensitive membrane and the platinum substrate have been constructed. The p-tert-butylcalix[4]arene ethyl ester was used as ionophore for sodium recognition. The microelectrode shows a linear response for Na+ concentrations between 3.0 × 10−6 and 1.0 × 10−1 M with a Nernstian slope of 58.65 ± 2 mV per decade and a detection limit of 1.45 × 10−6 M. The response time was 14 s, and the electrode is suitable for use within the pH range of 3–10.
Keywords :
Solid-state ion selective microelectrode , Polypyrrole , Potentiometric , sodium
