Journal of Electrochemical Science and Technology

The Korean Electrochemical Society (한국전기화학회)
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Electroanalytical Determination of Copper(II) Ions Using a Polymer Membrane Sensor

  • Oguz Ozbek (Zonguldak Bülent Ecevit University, Science and Technology, Application and Research Center) ;
  • Meliha Burcu Gurdere (Tokat Gaziosmanpasa University, Faculty of Science and Arts, Department of Chemistry) ;
  • Caglar Berkel (Tokat Gaziosmanpasa University, Faculty of Science and Arts, Department of Molecular Biology and Genetics) ;
  • Omer Isildak (Tokat Gaziosmanpasa University, Faculty of Science and Arts, Department of Chemistry)
  • Received : 2022.08.16
  • Accepted : 2022.09.29
  • Published : 2023.02.28
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Abstract

In this study, a new potentiometric sensor selective to copper(II) ions was developed and characterized. The developed sensor has a polymeric membrane and contains 4.0% electroactive material (ionophore), 33.0% poly(vinyl chloride) (PVC), 63.0% bis(2-ethylhexyl)sebacate (BEHS) and 1.0% potassium tetrakis(p-chlorophenyl)borate (KTpClPB). This novel copper(II)-selective sensor exhibits a Nernstian response over a wide concentration range from 1.0×10-6 to 1.0×10-1 mol L-1 with a slope of 29.6 (±1.2) mV decade-1, and a lower detection limit of 8.75×10-7 mol L-1. The sensor, which was produced economically by synthesizing the ionophore in the laboratory, has a good selectivity and repeatability, fast response time and stable potentiometric behaviour. The potential response of the sensor remains unaffected of pH in the range of 5.0-10.0. Based on the analytical applications of the sensor, we showed that it can be used as an indicator electrode in the quantification of Cu2+ ions by potentiometric titration against EDTA, and can also be successfully utilized for the determination of copper(II) ions in different real samples.

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