Development of New Copper(II) Ion-Selective Poly(vinyl chloride) Membrane Electrode Based on 2,6-Diacetylpyridine-(1R)-(-)-Fenchone Diazine Ligand

摘要

The construction and performance characteristics of polymeric membrane electrodes based on 2,6- diacetylpyridine-(1R)-(-)-fenchone diazine ligand (A) for quantification of copper ions, are described.Effect of various plasticizers and anion excluder, sodium tetraphenylborate (NaTPB) was studied andimproved performance was observed at several instances. Best performance was obtained with themembrane having the following composition; A (7): PVC (50): TMDP (86): NaTPB (1). The membrane electrodes exhibits Nernstian response in the concentration range of 1.010 to 1.010 Mwith a detection limit of 2.510 M and wide pH range (4.0.0). The potentiometric selectivitycoefficient values as determined by fixed interference method indicate excellent selectivity for copperions over interfering cations. Each electrode possesses a fast response time of below 20s and a shelflife period of 3 months. The analytical utility of the proposed electrode was demonstrated by itsapplication in the determination of copper in wastewater samples and the results were in agreementwith those obtained with an atomic absorption spectroscopy (AAS) method.