Polymeric membrane ion-selective electrode for copper(II) ions based on CuII-cyclohexaneone thiosemicarbazone complex

Department of Chemistry, Zakir Husain College, University of Delhi, J.L. Nehru Marg,
New Delhi-110 002, India
E-mail : schandra_OO@yahoo.com Fax : 91-11-234276530
Manuscript received 11 August 2006, revised 22 January 2007, accepted 22 January 2007

A PVC-based membrane of copper(II)-cyclohexaneone thiosemicarbazone complex shows a Nernstain poteniometric response (with slope of 29.2 mV/decade) for copper(II) ions over a wide concentration range (1 x 10^-1 to 1 x 10^-9 M). The potential of the electrode is independent of pH in the range 2.0-7.0. It has a fast response of about 15 s and was used for a period of 2 months with good reproducibility.