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Journal of Electrochemical Science and Engineering, Vol.5 No.4 December 2015. -

A chemically modified carbon paste electrode with diphenyl carbazide the potentio-metric determination of CuII is demonstrated. The electrode exhibits linear response to CuII over a wide concentration range 9.2×10−7 - 5.0×10−1 with Nernstian slope of 30±0.15 mV per decade. It has a response time of about 40 s and can be used for a period of two months with good reproducibility. The detection limit of this electrode was 7.0×10−7 M. The proposed electrode shows a very good selectivity for CuII over a wide variety of metal ions. This chemically modified carbon paste electrode was successfully used for the determination of CuII in various water samples solution and pharma-ceutical formulation.

Diphenyl carbazide; Copper; Potentiometric; Method validation



Autor: Salwa Fares Rassi - ; Department of Chemistry, Faculty of Science, Al-Baath University, Homs, Syria

Fuente: http://hrcak.srce.hr/



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