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

in this work, a novel zr02+ pvc-based membrane sensor based on 4,7,13,16,21,24-hexa oxa-1,10- diazabicyclo[8,8,8]- hexa cosane (hodbhc) as a new ionophore is presented. the sensor displays a linear dynamic rangebetween 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(ph=1). the limit of detection is 8.0 x 1 0 7 m. the electrodes possess advantages of low resistance, very fastresponse time, relatively long lifetimes and, especially, good selectivities relative to a wide variety of othercations. it was used as indicator electrode in potentiometric determination of zro2+ ion by standard additionmethod at ph 1.0 in two samples.