Cu(II)-All Solid State Sensor Ion Selective Electrode (ASS-ISE) with a Nano-molar Detection Limit and its Use for the Analysis of Waste Water Samples

摘要

The present work focuses on the development of an all-solid-state electrode (ASSE) for the2+ determination of Cu ions in complex matrices. The ASSE is made of a layer of a conductive2+ graphite-epoxy resin, coated on a copper wire. The composite layer is further covered with a Cuselective PVC membrane composed of 33% PVC as the base material, 58% nitrobenzene (NB) as aplasticizing solvent, 3% of potassium tetrakis (p-chlorophenyl) borate (KpClTPB) which acts as anionic additive, and 6% of a copper selective ionophore (L). The ASSE was found to have a Nernstian-8 -3 potential response of 29.40.4 mV/decade over a dynamic linear range from 1.010 M to 1.010 M2+ -9 -1 of Cu and the detection limit of the sensing device was also evaluated to be 2.410 mol L . Theselectivity of the sensor towards the target ion in the presence of different commonly occurringinterfering ions was found to be very good, and to test its applicability in the analysis of real samples2+ with complex matrices the ASSE was applied for the determination of Cu in waste water samples ofcopper electroplating, and the results were found to be very satisfactory.