Naslov
Copper(II) ion selective PVC membrane electrode based on S, S' bis(2 aminophenyl)ethanebis(thioate)

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

Izvornik
Croatica chemica acta (0011-1643) 82 (2009), 4; 801-806

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

Ključne riječi
copper(II); ISE; S; S'-bis(2-aminophenyl)ethanebis(thioate); polymer membrane electrodes; potentiometry

Sažetak
S, S'-bis(2-aminophenyl)ethanebis(thioate) (APhET) was synthesized and used as ion carrier in the fabrication of copper(II) ion selective PVC membrane electrodes. The best performances are obtained by a membrane electrode having composition: PVC as matrix (66 mg), APhET as ionophore (4 mg), o-NPOE as plasticizer (132 mg) and NaTBP as anionic additive (1/2 mole ratio in respect to APhET). This electrode shows a linear potential response to copper(II) in concentration range 6.0×10-6 - 5.0×10-2 moldm-3, with Nernstian slope of 29.5 mV/decade and detection limit down to 4×10-6 moldm-3. It is suitable for copper(II) determinations within pH between 4 and 7, and work well over a period of 3 months. The electrode is selective for copper over a large number of metal ions, except Hg2+. There were no noticed any interference by chlorides and other examined anions. Described membrane electrode can be used in analytical measurements by direct potentiometry as well in potentiometric titration.

Izvorni jezik
Engleski

Znanstvena područja
Kemija

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