Naslov
Impedimetric Au-NTA sensor for lead determination

Autori
Palčić, Marina ; Kereković, Irena ; Milardović, Stjepan ; Grabarić, Zorana

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
14th Ružička days, TODAY SCIENCE-TOMORROW INDUSTRY / Jukić, Ante - Zagreb : HKDI, 2013, 64-75

ISBN
978-953-6894-51-2

Skup
Ružičkini dani (14 ; 2012)

Mjesto i datum
Vukovar, Hrvatska, 13.09.2012. - 15.09.2012

Vrsta sudjelovanja
Poster

Vrsta recenzije
Domaća recenzija

Ključne riječi
impedimetric sensor; self assembled monolayer; lead; modified gold electrode

Sažetak
Recently, we have developed a chemically modified gold electrode by using nitrilotriacetic acid (NTA) functionalized thiol monolayers prepared by soaking a cysteamine attached gold electrode in an aqueous solution of NTA.Thiol monolayers prepared on gold electrode serve as the anchor layer to immobilize NTA molecules using EDC/NHS chemistry.Existence of each layer on the top of disc gold electrode was confirmed by cyclic voltammetry and electrochemical impedance spectroscopy(EIS) in acidic and basic solution using Fe(CN)63-/4- redox pair. The electrode prepared in this way was used for lead determination.The binding of Pb2+ onto the modified electrode was successfully performed in a wide range of tested concentrations and was confirmed by EIS. Electrode response (log Rct) was linerly proportional to log c (Pb) with squared correlation coefficient R2 = 0.9865 for measurements in acetic buffer pH = 4.6 and R2 = 0.9931 for measurements in boric buffer pH =7.0 at micromolar concentration level.

Izvorni jezik
Engleski

Znanstvena područja
Kemija

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