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

Povzetek

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.

Ključne besede

ionsko-selektivna elektroda;potenciometrija;določanje sulfatov;magnetit;kovinski oksidi;SEM-EDS;ionska kromatografija;ion-selective electrode;potentiometry;sulfate determination;magnetite;metal oxides;ion chromatography;

Podatki

Jezik: Angleški jezik
Leto izida:
Tipologija: 1.01 - Izvirni znanstveni članek
Organizacija: UL FKKT - Fakulteta za kemijo in kemijsko tehnologijo
UDK: 543.554:620.3
COBISS: 236013827 Povezava se bo odprla v novem oknu
ISSN: 2666-8319
Št. ogledov: 62
Št. prenosov: 51
Ocena: 0 (0 glasov)
Metapodatki: JSON JSON-RDF JSON-LD TURTLE N-TRIPLES XML RDFA MICRODATA DC-XML DC-RDF RDF

Ostali podatki

Sekundarni jezik: Slovenski jezik
Sekundarne ključne besede: ionsko-selektivna elektroda;potenciometrija;določanje sulfatov;magnetit;kovinski oksidi;SEM-EDS;ionska kromatografija;
Vrsta dela (COBISS): Članek v reviji
Strani: str. 1-7
Zvezek: ǂVol. ǂ11, [article no.] 100468
Čas izdaje: Aug. 2025
DOI: 10.1016/j.talo.2025.100468
ID: 27132405