Determination of Thiocyanate Ion by Ion-selective Electrode Using Schiff Base Complex of Cu(II) as an Ionophore

This study is related with the determination of thiocyanate anion by using 3,12-diaza-4,5,10,11-dibenzo-16-methyl-6,9-dioxaheptadec-1(17),14,15-triene-2,13diimenecopper(ii) as ionophore. the membrane sensor with composition of 37% pvc, 60%,bes, 2% htbp and 1% ionophore, exhibits a nernstian response for thiocyanate ion, with awide concentration range of 4.4×10?8?1.0×10?1 m, low detection limit (1.0×10?8 m) andslope of 60.5.±0.3 mv decade?1 of activity within ph range of 2.5–8.5 and fast response timeof 5s. the sensor was also found to work satisfactorily in partially non-aqueous media up to30% (v/v) content of methanol, ethanol or acetone and could be used for a period of 2 monthswithout any change in response characteristics.