Novel ISE modified with synthesized magnetite nanoparticles for sulfates determination

Hajdin, Ita (avtor), Zanki Kulazo, Karmela (avtor), Prkić, Ante (avtor), Nakić, Kristian (avtor), Paut, Andrea (avtor), Guć, Lucija (avtor), Kolar, Mitja (avtor), Genorio, Boštjan (avtor), Mitar, Ivana (avtor)

Potentiometric ISEs are one of the fastest developing sensors in electrochemistry due to their wide range of applications. They are used in the food industry, agriculture, environmental and drug analysis as they offer numerous advantages: high selectivity and sensitivity, low LOD, small size, easy handling, portability and low cost. We have therefore developed a solid-state ISE for the potentiometric determination of sulfate ions. The membranes are based on a mixture of barium sulfate, silver sulfide, polymer and metal oxide nanoparticles. The mass ratio of BaSO$_4$, Ag$_2$S and PTFE in the membranes was 1 : 1 : 2, with the addition of various metal oxide NPs, such as Fe$_3$O$_4$, α-Fe$_2$O$_3$, Al$_2$O$_3$ or ZnO, to the membrane composition. The membrane containing magnetite NPs showed a positive effect on the linear response range for sulfate anions. In particular, the membrane containing 0.6 % magnetite NPs showed a linear potential change with a slope of 28.5 mV dec$^{−1}$, which is very close to the theoretical Nernstian value (29.6 mV dec$^{−1}$), with a regression coefficient of 0.9978 in the concentration range between 4.88 ∙ 10$^{−5}$ mol L$^{−1}$ and 1.00 · 10$^{−2}$ mol L$^{−1}$ with LOD 4.40 ∙ 10$^{−5}$ mol L$^{−1}$. Finally, none of the membranes showed response to barium ions even at high concentrations (≥ 1.00 ∙ 10$^{−3}$ mol L$^{−1}$). These results confirm that our newly developed potentiometric sensor has a high membrane selectivity for the determination of sulfate ions and, most importantly, that it is a fast, reliable and cost-effective tool.

• Jezik: Angleški jezik
• Ključne besede: ion-selective electrode, potentiometry, sulfate determination, magnetite, metal oxides, SEM-EDS, ion chromatography
• Vrsta gradiva: Članek v reviji
• Tipologija: 1.01 - Izvirni znanstveni članek
• Organizacija: FKKT - Fakulteta za kemijo in kemijsko tehnologijo
• Status publikacije: Objavljeno
• Različica publikacije: Objavljena publikacija
• Leto izida: 2025
• Št. strani: Str. 1-7
• Številčenje: Vol. 11, art. 100468
• PID: 20.500.12556/RUL-171266
• UDK: 543.554:620.3
• ISSN pri članku: 2666-8319
• DOI: 10.1016/j.talo.2025.100468
• COBISS.SI-ID: 236013827
• Datum objave v RUL: 21.08.2025

Gradivo je del revije

• Naslov: Talanta open
• Založnik: Elsevier B.V.
• ISSN: 2666-8319
• COBISS.SI-ID: 56396547

Licence

• Licenca: CC BY-NC-ND 4.0, Creative Commons Priznanje avtorstva-Nekomercialno-Brez predelav 4.0 Mednarodna
• Povezava: http://creativecommons.org/licenses/by-nc-nd/4.0/deed.sl
• Opis: Najbolj omejujoča licenca Creative Commons. Uporabniki lahko prenesejo in delijo delo v nekomercialne namene in ga ne smejo uporabiti za nobene druge namene.

Sekundarni jezik

• Jezik: Slovenski jezik
• Ključne besede: ionsko-selektivna elektroda, potenciometrija, določanje sulfatov, magnetit, kovinski oksidi, SEM-EDS, ionska kromatografija

Projekti

• Financer: HRZZ - Croatian Science Foundation
• Številka projekta: UIP-2017-05-6282
• Naslov: Razvoj novih membrana za ionsko-selektivne elektrode s dodatkom nanočestica metala i metalnih oksida

• Financer: Drugi - Drug financer ali več financerjev
• Naslov: Preparation and characterization of potentiometric sensors using new or modified electrode materials