Naslov
Istovremeno određivanje amonijevog, nitratnog i nitritnog iona u otpadnoj vodi direktnom potenciometrijom
(Simultaneous determination of ammonium, nitrate and nitrite in wastewater by means of direct potentiometry)

Autori
Velić, Natalija ; Galović, Olivera ; Sak-Bosnar, Milan ; Stanić, Ana ; Rezić, Tonči ; Šantek, Božidar

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

Izvornik
13th Ružička Days Today science - tomorrow industry / Šubarić, Drago - Osijek, 2010, 31-31

Skup
13th Ružička Days

Mjesto i datum
Vukovar, Hrvatska, 16.09.2010. - 17.09.2010

Vrsta sudjelovanja
Poster

Vrsta recenzije
Domaća recenzija

Ključne riječi
ion-selective electrodes (ISE); ammonium; nitrate; nitrite; wastewater

Sažetak
Nitrogen is one of the most commonly occurring elements in nature and forms many inorganic ionic species, such are ammonium, nitrate and nitrite ions, being most important. The simultaneous determination of ammonium, nitrate and nitrite ions in water, food, biological and environmental matrices is of vital significance due to their toxicity to humans (infants) and water systems (eutrophication). Ion-selective electrodes (ISE) are a promising approach because of their small size, rapid response, and ability to directly measure the analyte. In this study the simultaneous determination of ammonium, nitrate and nitrite ions was performed in modelled and real systems (wastewater) using commercial ISE (ELIT, NICO2000 Ltd.). The used ISE respond to ammonium, nitrate and nitrite ion according to the Nernst equation. The accuracy of determination (95, 8% - 101, 0%) can be considered satisfactory for the ammonium, nitrate and nitrite determination in complex matrices. A satisfactory fit of the theoretical models to the experimental values was obtained in all cases for the tested sensors and calibration parameters.

Izvorni jezik
Engleski

Znanstvena područja
Kemija

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