Cadmium(II)-selective potentiometric sensor based on synthesised (<i>E</i>)-2-benzylidenehydrazinecarbothioamide for the determination of Cd<SUP>2+</SUP>in different environmental samples
Oguz Ozbek, Omer Isildak, Meliha Burcu Gurdere, Caglar Berkel
article (Uluslararası, Hakemli) | Yazar(lar): Oguz Ozbek, Omer Isildak, Meliha Burcu Gurdere, Caglar Berkel | Yıl: 2022 | Dergi/Kurum: INTERNATIONAL JOURNAL OF ENVIRONMENTAL ANALYTICAL CHEMISTRY | İndeks: WOS.SCI | DOI: 10.1080/03067319.2020.1817427 | Anahtar Kelimeler: Cadmium(II), ion-selective electrode, environment
In the present study, we developed a cadmium(II)-selective sensor using a novel poly(vinyl chloride) membrane, containing synthesised (E)-2-benzylidenehydrazinecarbothioamide as an ionophore. This newly developed cadmium(II)-selective sensor exhibits best performance with a membrane composition of poly(vinyl chloride) (PVC), bis(2-ethylhexyl) adipate (DEHA), ionophore, potassium tetrakis (p-chlorophenyl) borate (KTpClPB) at 32.0:63.0:4.0:1.0 ratio (%, w/w). The cadmium(II)-selective sensor exhibits a lower detection limit of 1.77 x 10(-6)mol L-1. This potentiometric sensor displays a stable potential response in the pH range of 5.0-10.0 and it shows a good selectivity for Cd(2+)in the presence of interfering ions. The developed sensor shows a relatively fast response time (10 s), good reusability and stability. The proposed cadmium(II)-selective sensor was successfully applied as an indicator electrode in potentiometric titration of Cd(2+)ions with EDTA and for the direct determination of Cd(2+)ions in different environmental samples and in a waste battery sample.