Development of the new fluoride ion-selective electrode modified with Fe$_x$O$_y$ nanoparticles

Radić, Josip (author), Bralić, Marija (author), Kolar, Mitja (author), Genorio, Boštjan (author), Prkić, Ante (author), Mitar, Ivana (author)

A new modified ion-selective electrode with membranes of LaF$_3$ single crystals with different internal contacts (solid steel or electrolyte) and with Fe$_x$O$_y$ nanoparticles as loading was developed. The best response characteristic with linear potential change was found in the fluoride concentration range from 10$^{−1}$ to 3.98 × 10$^{−7}$ M. The detection limit for the electrolyte contact was determined at 7.41 × 10$^{−8}$ M with a regression coefficient of 0.9932, while the regression coefficient for the solid contact was 0.9969. The potential change per concentration decade ranged from 50.3 to 62.4 mV, depending on whether the contact was solid or electrolytic. The prepared modified electrode has a long lifetime, as well as the possibility of application in different positions (solid contact), and it can also be used for the determination of iron ions. The electrode characterization was performed with scanning electron microscopy and elemental analysis with the technique of electron-dispersive X-ray spectroscopy.

• Language: English
• Keywords: fluoride ion-selective electrode, nanoparticles, modification, ion-selective electrode, fluoride, metal nanoparticles, internal contact, elemental analysis
• Work type: Article
• Typology: 1.01 - Original Scientific Article
• Organization: FKKT - Faculty of Chemistry and Chemical Technology
• Publication status: Published
• Publication version: Version of Record
• Year: 2020
• Number of pages: 13 str.
• Numbering: Vol. 25, iss. 21, art. 5213
• PID: 20.500.12556/RUL-134715
• UDC: 544.6.076.327:620.3
• ISSN on article: 1420-3049
• DOI: 10.3390/molecules25215213
• COBISS.SI-ID: 36710915
• Publication date in RUL: 27.01.2022

Record is a part of a journal

• Title: Molecules
• Shortened title: Molecules
• Publisher: MDPI
• ISSN: 1420-3049
• COBISS.SI-ID: 18462981

Licences

• License: CC BY 4.0, Creative Commons Attribution 4.0 International
• Link: http://creativecommons.org/licenses/by/4.0/
• Description: This is the standard Creative Commons license that gives others maximum freedom to do what they want with the work as long as they credit the author.
• Licensing start date: 09.11.2020

Secondary language

• Language: Slovenian
• Keywords: fluoridna ionoselektivna eletroda, nanodelci, Fe$_x$O$_y$, modifikacije

Projects

• Funder: HRZZ - Croatian Science Foundation
• Project number: UIP-2017-05-6282

• Funder: ARRS - Slovenian Research Agency
• Project number: P1-0153
• Name: Raziskave in razvoj analiznih metod in postopkov