| Abstract: | Abstract The potentiometric response characteristics of a new copper(II) ion-selective PVC membrane electrode based on erythromycin ethyl succinate (EES) as ionophore were investigated. The electrode exhibited a Nernstian response to Cu2+ ions over the activity range of 1.5 × 10?2 to 2.0 × 10?6 mol L?1 with a limit of detection of 6.3 × 10?7 mol L?1. Stable potentials were obtained in the pH range of 5.5–6.5. The potentiometric selectivity coefficients were calculated by using fixed interference method and revealed no important interferences except for Ag+. This electrode was successfully applied as an indicator electrode in determination of copper ions in real water samples. |
