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master's thesis
Potenciometrijsko određivanje tiabendazola
2021. urn:nbn:hr:182:185282
Bubnjar, Karlo
Josip Juraj Strossmayer University of Osijek
Department of Chemistry
Department of Analytical, Organic and Applied Chemistry

Cite this document

Bubnjar, K. (2021). Potenciometrijsko određivanje tiabendazola (Master's thesis). Osijek: Josip Juraj Strossmayer University of Osijek, Department of Chemistry. Retrieved from https://urn.nsk.hr/urn:nbn:hr:182:185282

Bubnjar, Karlo. "Potenciometrijsko određivanje tiabendazola." Master's thesis, Josip Juraj Strossmayer University of Osijek, Department of Chemistry, 2021. https://urn.nsk.hr/urn:nbn:hr:182:185282

Bubnjar, Karlo. "Potenciometrijsko određivanje tiabendazola." Master's thesis, Josip Juraj Strossmayer University of Osijek, Department of Chemistry, 2021. https://urn.nsk.hr/urn:nbn:hr:182:185282

Bubnjar, K. (2021). 'Potenciometrijsko određivanje tiabendazola', Master's thesis, Josip Juraj Strossmayer University of Osijek, Department of Chemistry, accessed 18 November 2024, https://urn.nsk.hr/urn:nbn:hr:182:185282

Bubnjar K. Potenciometrijsko određivanje tiabendazola [Master's thesis]. Osijek: Josip Juraj Strossmayer University of Osijek, Department of Chemistry; 2021 [cited 2024 November 18] Available at: https://urn.nsk.hr/urn:nbn:hr:182:185282

K. Bubnjar, "Potenciometrijsko određivanje tiabendazola", Master's thesis, Josip Juraj Strossmayer University of Osijek, Department of Chemistry, Osijek, 2021. Available at: https://urn.nsk.hr/urn:nbn:hr:182:185282

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Metadata
TitlePotenciometrijsko određivanje tiabendazola
Title (english)Potentiometric detection of thiabendazole
AuthorKarlo Bubnjar
MentorMirela Samardžić (mentor)
MentorAleksandar Sečenji (komentor)
Committee memberBrunislav Matasović (predsjednik povjerenstva)
Committee memberMirela Samardžić (član povjerenstva)
Committee memberAleksandar Sečenji (član povjerenstva)
GranterJosip Juraj Strossmayer University of Osijek
Department of Chemistry
(Department of Analytical, Organic and Applied Chemistry)
Osijek
Defense date and country2021-12-21, Croatia
Scientific / art field,
discipline and subdiscipline		NATURAL SCIENCES
Chemistry
Analytic Chemistry
Abstract
Tiabendazol (TBZ) je antifungalno sredstvo koje se najčešće koristi kao fungicid u voću i povrću. Budući da je potencijalno toksičan kada se unosi putem hrane, vrlo je bitno razviti nove metode za njegovo određivanje. Cilj ovog rada je bio razviti potenciometrijski senzor za određivanje TBZ-a koristeći ionski par TBZ-a i 5-sulfosalicilatnog aniona kao senzorski materijal. Metode koje su korištene za njegovo određivanje su bile direktna potenciometrija i Granova metoda. Senzorski materijal je inkorporiran u tekuću membranu ionsko selektivne elektrode (ISE). Prilikom optimizacije membrane, variran je postotak senzorskog materijala i vrsta plastifikatora. Najboljom se pokazala kombinacija 1 % senzorskog materijala i dibutil sebakata (DS-a) kao plastifikatora. Senzor je pokazao super Nernstovski nagib, široko mjerno područje i nisku granicu detekcije. Vrijeme odziva je bilo nekoliko sekundi, a mjerno pH područje od 2 do 4. Pokazao je dobru selektivnost prema TBZ-u. Svi parametri su doveli do brzog i točnog određivanja TBZ-a u realnim uzorcima.
Abstract (english)
Thiabendazole (TBZ) is an antifungal agent that is mostly used as a fungicide in fruits and vegetables. Since it is potentially toxic and harmful when obtained through food, it is important to develop new methods for TBZ determination. The aim of this study was to develop potentiometric sensor for determination of TBZ using an ionic pair of TBZ and 5-sulfosalicylate anion as a sensor material. The methods that were used for sensor characterization and TBZ determination were direct potentiometry and the Gran method. The sensor material was incorporated in a liquid membrane of an ion-selective electrode. During the optimization of the membrane, the percentage of the sensor material and different plasticizers were varied. The chosen sensor with dibutyl sebacate as plasticizer and 1% of sensor material in the membrane showed the best results. The sensor showed a super-Nernstian slope, a wide measuring range, and a low limit of detection. The response time of the sensor was only a few seconds, and pH working range was between 2 and 4. It had a good selectivity towards TBZ. All these parameters led to fast and accurate determination of TBZ in real samples.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:182:185282
Study programmeTitle: Graduate University Study of Chemistry; research program; specializations in: Research program
Course: Research program
Study programme type: university
Study level: graduate
Academic / professional title: magistar/magistra kemije (magistar/magistra kemije)
Type of resourceText
File originBorn digital
Access conditionsOpen access
Terms of useLicence In copyright icon
Created on2022-08-03 09:19:39