Naslov
Solid-contact Cu(II) ion-selective electrode based on 1, 2 di (o salicylaldiminophenylthio)ethane

Autori
Brinić, Slobodan ; Buzuk, Marijo ; Bralić, Marija ; Generalić, Eni

Izvornik
Journal of solid state electrochemistry (1432-8488) 16 (2012), 4; 1333-1341

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
Cu(II) • ISE; Solid-contact; Potentiometry; Impedance; Carbon ink

Sažetak
The development of Cu(II) solid-contact ion-selective electrodes (SC-ISE), based on 1, 2 di (o salicylaldiminophenylthio)ethane, SAPhTE, as a neutral carrier, is presented. For the electrodes construction, unmodified carbon ink (type 1electrode) and polymer membrane modified carbon ink (type 2 electrode) were used as solid support and transducer layer. Also, carbon ink composite polymer-membrane electrode (type 3 electrode) was prepared. The analytical performance of the electrodes was evaluated with potentiometry, while bulk and interfacial electrode features were provided with electrochemical impedance spectroscopy (EIS). It is shown that modification of carbon ink with polymer membrane cocktail decreases bulk-contact resistance of the transducer layer and polymer membrane, thus enhancing the analytical performance of the electrode in terms of sensitivity, linear range and stability of potential. The optimized electrodes of type 2 and type 3 exhibit a wide linear range with detection limits of 1.8 × 10-6 M and 1.6 × 10-6 M, respectively. They are suitable for determination of Cu2+ in analytical measurements by direct potentiometry and in potentiometric titrations, within pH between 2.3 and 6.5. The electrodes are selective for Cu2+ over a large number of tested transition and heavy metal ions.

Izvorni jezik
Engleski

Znanstvena područja
Kemija

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