Electroanalytical Determination of Copper(II) Ions Using a Polymer Membrane Sensor

In this study, a new potentiometric sensor selective to copper(II) ions was developed and characterized. The has polymeric membrane contains 4.0% electroactive material (ionophore), 33.0% poly(vinyl chloride) (PVC), 63.0% bis(2–ethylhexyl)sebacate (BEHS) 1.0% potassium tetrakis(<italic>p</italic>–chlorophenyl)borate (KT<italic>p</italic>ClPB). This novel copper( II)–selective exhibits Nernstian response over wide concentration range from 1.0×10<sup>−6</sup> 1.0×10<sup>−1</sup> mol L<sup>−1</sup> with slope of 29.6 (±1.2) mV decade<sup>−1</sup>, lower detection limit 8.75×10<sup>−7</sup> L<sup>−1</sup>. sensor, which produced economically by synthesizing the ionophore in laboratory, good selectivity repeatability, fast time stable behaviour. potential remains unaffected pH 5.0–10.0. Based on analytical applications we showed that it can be used as an indicator electrode quantification Cu<sup>2+</sup> titration against EDTA, also successfully utilized for determination different real samples.