A Highly Selective Copper (II) Electrode Based On 2-Acetylpyridine-(1r)-(-)Fenchone Azline Ligand
- Illyas Md Isa
- Mustaffa Ahmad
GRANTOR OF RESEARCH FUND
UNIVERSITI PENDIDIKAN SULTAN IDRIS
Plasticized membranes based on 2-acetylpyridine-(1R)-(-)-fenchone azine ligand (L) have been prepared and explored as Cu2+ -selective sensors. Effect of various plasticizers and anion excluder, sodium tetraphenylborate (NaTPB) was studied in detail and improved performance was observed at several instances. Optimum performance was observed with copper(II) ion-selective electrode having a membrane composition of L (6): PVC (40): DOP (56): NaTPB (1). The sensor works satisfactorily in the concentration range of 1.0x10-5 to 1.0x10-1 M with a detection limit of 4.0x10-6 M and a Nernstian slope of 30.0 ± 0.2 mV/decade. Wide pH range (4.0-5.0 and 6.0-10.0), fast response time (≤20s) and adequate lifetime (3 month) indicate the vital utility of the proposed sensor. This electrode was used for the determination of copper in wastewater samples and the results were in agreement with those obtained with an atomic absorption spectroscopy (AAS) method.