- Turkish Journal of Chemistry
- Vol: 32 Issue: 3
- A Hydrogen Ion-Selective Poly(Vinyl Chloride) Membrane Electrode Based on Calix[4]arene as a Perchlo...
A Hydrogen Ion-Selective Poly(Vinyl Chloride) Membrane Electrode Based on Calix[4]arene as a Perchlorate Ion-Selective Electrode
Authors : Esin Canel, Sevcan Erden, Ayça Demirel Özel, Sahahabuddin Memon
Pages : 323-332
View : 11 | Download : 9
Publication Date : 9999-12-31
Article Type : Makaleler
Abstract :A hydrogen ion-selective electrode was prepared using 5,11,17,23-tetra-tert-butyl-25,26,27,28-tetracyanometoxy-calix[4]arene and the possibility of its use as a perchlorate ion-selective electrode was investigated using its characteristic of becoming perchlorate sensitive in acidic regions. The electrode of the optimum characteristic had a composition of 1% ionophore, 66% o-NPOE, and 33% PVC. This electrode exhibited a linear response over the range 1.0 \times 10-1-1.0 \times 10-5 M of perchlorate with a slope of 48.7 \pm 0.5 mV per p[ClO4]. The effects of the pH and the membrane composition were also investigated. The lifetime of the electrode was at least 4 months and its response time was 10-15 s. The selectivity coefficients of some anions were calculated by the matched potential method.Keywords : Calix[4]arene, perchlorate, PVC membrane ion-selective electrode, potentiometry