Synthesis and application of 2-(5-bromo- 2hydroxybenzylidene) toluenesulfonohydrazide as a shift base ionophore for highly selective copper(II) membrane electrode

Illyas Md Isa

Abstract

The construction of a potentiometric copper(II) ion electrode based on 2’-(5-bromo-2-hydroxybenzylidene) toluenesulfonohydrazide (5BrSALMeBSH) as an ionophore has been developed.The designed electrode having a different composition of poly(vinyl chloride) (PVC), plasticizers and ionophore showed that sensor with membrane composition 5BrSALMeBSH: PVC: DOP in the ratio of 7:40:56 (w/w) gave the best response. It exhibited a wide linear response with a Nernstian slope of 29.34 mV per decade over the concentration range of 1.0 x 10-5 – 1.0 x 10-1 M Cu(II) ions. Under the optimized conditions, the electrode has a detection limit of 3.98 x 10-6 M and the working pH range of 3.0 - 6.0 with response time less than the 20s. The proposed electrode is stable for about two months and exhibits good selectivity for Cu(II) ions over Zn2+, Co2+ , Ni2+, Pb2+ ,Mg2+,Ba2+,Ca2+,Cd 2+,Ce3+,K+,Na+.Designation of this easy and inexpensive electrode was used to determine a copper ion in wastewater samples, and the results obtained shown a sync relation with spectroscopy method which is AAS method conducted.

References

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