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

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

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
XXI Skup kemičara i kemijskih inženjera / - , 2009

Skup
XXI. Skup kemičara i kemijskih inženjera

Mjesto i datum
Trogir, Hrvatska, 19.04.2009. - 22.04.2009

Vrsta sudjelovanja
Poster

Vrsta recenzije
Nije recenziran

Ključne riječi
ionophore; copper(II); ion selective; potentiometry

Sažetak
1, 2-di-(o-salicylaldiminophenylthio)ethane was synthesized and used as ion carrier in the fabrication of copper(II) ion selective PVC membrane electrodes. Influence of different component ratio, and different plasticizer were study for obtaining a sensor with optimal response characteristic for determination of copper(II) in water sample in wide pH range. The best performances are obtained by a membrane electrode having o-NPOE as plasticizer and and NaTBP as anionic additive (1/2 mole ratio in respect to ion carrier). This electrode shows a linear potential response to copper(II) in concentration range 9×10-7 - 1×10-2 moldm-3, with Nernstian slope of 29.5 mV/decade and detection limit down to 5×10-7 moldm-3. It is suitable for copper(II) determinations within pH between 3.5 and 7.3, and work well over a period of 2 months. The potentiometric selectivity coefficient value ( ) as determinated by fixed interference method indicate excellent selectivity for Cu2+ ions over interfering cations. 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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