Polymer membrane biosensor based on potentiometric sensing of ammonium and urea
Makaleler > Tam Makale · 1999
Yazarlar: Kadriye Arzum ERDEM GÜRSAN, T. Dalbasti, M. Bas, A. Ilis, M. Ozsoz
Acta Pharmaceutica Turcica, Uluslararası, Scopus, 1999, cilt 41, ss 29-35
Özet
A poly(vinyl chloride) (PVC) matrix nonactin based ammonium selective membrane electrode was developed as sensors for ammonium (NH4+) as well as for urea determination after jack bean meal was immobilized. This NH4+ selective electrode exhibited Nernstian response over the linearity range 9.5 x 10-5-1.0 x 10-1 M with slope of 59 mV/decade in the standard NH4+ solutions. The linearity range was found 9.0 x 10-5-1.0 x 10-1 M with slope of 40 mV/decade with enzyme electrode in the standard urea solutions. As the nonactin based ammonium selective electrode suffers from interference of potassium and sodium ions in the urea solution, the interference effect of sodium and potassium ions has been investigated.