Electroanalytical Determination of Copper(II) Ions Using a Polymer Membrane Sensor
Oguz Ozbek, Meliha Burcu Gurdere, Omer Isildak, Caglar Berkel
article (Uluslararası, Hakemli) | Yazar(lar): Oguz Ozbek, Meliha Burcu Gurdere, Omer Isildak, Caglar Berkel | Yıl: 2023 | Dergi/Kurum: JOURNAL OF ELECTROCHEMICAL SCIENCE AND TECHNOLOGY | İndeks: WOS.SCI | DOI: 10.33961/jecst.2022.00661 | Anahtar Kelimeler: Potentiometry, Sensor, PVC membrane, Copper(II), Trace elements
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 1.0x10(-6) to 1.0x10(-1) mol L-1 with a slope of 29.6 (+/- 1.2) mV decade-1, and a lower detection limit of 8.75x10(-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.