Potentiometric Chromate Quantification Based on Interaction with N, N' Butylen Bis (Saliciliden Irninato) Copper (II)

A new chromate-selective electrode, based on the n, n' butylen bis (saliciliden iminato) copper(ii) complex as the membrane carrier, was developed. the electrode exhibited a good nernstianslope of -28.8(plus-minus) 0.5 mv/decade and a linear range of 3.0 x 10^- 6 - 1.0 x 10^-1 mol.l ^-i forchromate. the limit of detection was 3.0 x 10^-6 mol.l^- i . it had a fast response time of 5-10sec and could be used for more than three months. the selective coefficients were determinedby the fixed interference method (fim). a chromate-selective electrode could be used in theph range of 6.5-10.5. it was employed as an indicator electrode for the direct determination ofchromate in real samples.