Solid-contact Cu(II) ion-selective electrode based on 1, 2 di (o salicylaldiminophenylthio)ethane (CROSBI ID 173496)
Prilog u časopisu | izvorni znanstveni rad | međunarodna recenzija
Podaci o odgovornosti
Brinić, Slobodan ; Buzuk, Marijo ; Bralić, Marija ; Generalić, Eni
engleski
Solid-contact Cu(II) ion-selective electrode based on 1, 2 di (o salicylaldiminophenylthio)ethane
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.
Cu(II) • ISE; Solid-contact; Potentiometry; Impedance; Carbon ink
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Podaci o izdanju
16 (4)
2012.
1333-1341
objavljeno
1432-8488
10.1007/s10008-011-1528-z