Dergiler / Turkish Journal of Chemistry / 2008 / Cilt: 32 - Sayı: 5
Potentiometric Utility of the New Solid-State Sensor Based on Crowned Ionophore for the Determination of K+
- Sayfa
- 521–528
- DOI
- —
Özet
All solid-state contact poly vinyl chloride (PVC) membrane potassium-selective electrode has been developed. The construction of the ion selective electrode membrane was organized using ionophore 4,4'-bis[4''-phenoxy(15-crown-5) methyl]benzyl in PVC cocktail. The potentiometric performance characteristics of the electrode were investigated by a computerized system. The electrode was found highly selective to K+ ions over a wide variety of other cations. The electrode almost exhibited a Nernstian response (\ge 55 (\pm15) mV/decade of K activity) to K+ within the concentration range 1.5 x 10-1 - 1.0 \times 10-5 M. The operational pH range of the electrode was 5--7. The response time of the electrode was fast (
Abstract
All solid-state contact poly vinyl chloride (PVC) membrane potassium-selective electrode has been developed. The construction of the ion selective electrode membrane was organized using ionophore 4,4'-bis[4''-phenoxy(15-crown-5) methyl]benzyl in PVC cocktail. The potentiometric performance characteristics of the electrode were investigated by a computerized system. The electrode was found highly selective to K+ ions over a wide variety of other cations. The electrode almost exhibited a Nernstian response (\ge 55 (\pm15) mV/decade of K activity) to K+ within the concentration range 1.5 x 10-1 - 1.0 \times 10-5 M. The operational pH range of the electrode was 5--7. The response time of the electrode was fast (