Novel ZrO2 ion-selective electrode based on 4,7,13,16,21,24-hexa oxa- 1,10- diazabicyc1o[8,8,8]-hexa cosane as neutral carrier in PVC matrix

Abstract

In this work, a novel Zr02+ PVC-based membrane sensor based on 4,7,13,16,21,24-hexa oxa-1,10- diazabicyclo<br />[8,8,8]- hexa cosane (HODBHC) as a new ionophore is presented. The sensor displays a linear dynamic range<br />between 1.0x 10-1 and 1.0x10 6 M, with a near Nernstian slope of 29.9 ± 0.4 mV per decade in an acidic solution<br />(pH=1). The limit of detection is 8.0 x 1 0 7 M. The electrodes possess advantages of low resistance, very fast<br />response time, relatively long lifetimes and, especially, good selectivities relative to a wide variety of other<br />cations. It was used as indicator electrode in potentiometric determination of ZrO2+ ion by standard addition<br />method at pH 1.0 in two samples.