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master's thesis
Elektrokemijsko ponašanje katehina na ugljikovim nanomaterijalima : prilog optimizaciji elektrolitičkih metoda određivanja prirodnih reducensa
diplomski rad
Split: University of Split, Faculty of Chemistry and Technology, 2020. urn:nbn:hr:167:698567
Magazin, Ružica
University of Split
Faculty of Chemistry and Technology
Division of Chemistry

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Magazin, R. (2020). Elektrokemijsko ponašanje katehina na ugljikovim nanomaterijalima : prilog optimizaciji elektrolitičkih metoda određivanja prirodnih reducensa : diplomski rad (Master's thesis). Split: University of Split, Faculty of Chemistry and Technology. Retrieved from https://urn.nsk.hr/urn:nbn:hr:167:698567

Magazin, Ružica. "Elektrokemijsko ponašanje katehina na ugljikovim nanomaterijalima : prilog optimizaciji elektrolitičkih metoda određivanja prirodnih reducensa : diplomski rad." Master's thesis, University of Split, Faculty of Chemistry and Technology, 2020. https://urn.nsk.hr/urn:nbn:hr:167:698567

Magazin, Ružica. "Elektrokemijsko ponašanje katehina na ugljikovim nanomaterijalima : prilog optimizaciji elektrolitičkih metoda određivanja prirodnih reducensa : diplomski rad." Master's thesis, University of Split, Faculty of Chemistry and Technology, 2020. https://urn.nsk.hr/urn:nbn:hr:167:698567

Magazin, R. (2020). 'Elektrokemijsko ponašanje katehina na ugljikovim nanomaterijalima : prilog optimizaciji elektrolitičkih metoda određivanja prirodnih reducensa : diplomski rad', Master's thesis, University of Split, Faculty of Chemistry and Technology, accessed 19 April 2024, https://urn.nsk.hr/urn:nbn:hr:167:698567

Magazin R. Elektrokemijsko ponašanje katehina na ugljikovim nanomaterijalima : prilog optimizaciji elektrolitičkih metoda određivanja prirodnih reducensa : diplomski rad [Master's thesis]. Split: University of Split, Faculty of Chemistry and Technology; 2020 [cited 2024 April 19] Available at: https://urn.nsk.hr/urn:nbn:hr:167:698567

R. Magazin, "Elektrokemijsko ponašanje katehina na ugljikovim nanomaterijalima : prilog optimizaciji elektrolitičkih metoda određivanja prirodnih reducensa : diplomski rad", Master's thesis, University of Split, Faculty of Chemistry and Technology, Split, 2020. Available at: https://urn.nsk.hr/urn:nbn:hr:167:698567

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TitleElektrokemijsko ponašanje katehina na ugljikovim nanomaterijalima : prilog optimizaciji elektrolitičkih metoda određivanja prirodnih reducensa : diplomski rad
Title (english)Electrochemical behavior of catechin on carbon nanomaterials: a contribution to the optimization of electroanalytical methods for determination of natural reducers : diploma thesis
AuthorRužica Magazin
MentorMaša Buljac (mentor)
Committee memberMarijo Buzuk (predsjednik povjerenstva)
Committee memberIvana Škugor Rončević (član povjerenstva)
Committee memberMaša Buljac (član povjerenstva)
GranterUniversity of Split
Faculty of Chemistry and Technology
(Division of Chemistry)
Split
Defense date and country2020-09-29, Croatia
Scientific / art field,
discipline and subdiscipline		NATURAL SCIENCES
Chemistry
Abstract
U ovom radu izvršena je modifikacija elektrode od staklastog ugljika sa različitim ugljikovim nanomaterijalima (grafen, elektrokemijski reducirani grafenov oksid, jednozidne ugljikove nanočestice, višezidne ugljikove nanočestice). Ispitano je elektrokemijsko ponašanje modificiranih i elektrokemijski funkcionaliziranih elektroda u prisutnosti katehina u tri različita pufera (acetatni pufer, Britton-Robison pufer, model otopine vina), te pri različitim pH vrijednostima (2,6-3,6 u Britton-Robinson puferu). Elektrokemijsko ponašanje katehina je određivano u različitim puferima metodama cikličke voltametrije i elektrokemijske impedancijske spektroskopije (EIS). Prikazan je utjecaj različitog broja ciklusa, kao i ovisnost visine anodnog strujnog pika o brzini posmika i njegovu korijenu u različitim puferima, te utjecaj različitih pH vrijednosti. Uočena je znatna ovisnost elektrokemijskog ponašanja katehina na modificiranim elektrodama u ovisnosti o puferu u kojima su mjerenja vršena. Nakon provedenih mjerenja objašnjen je mehanizam elektrokemijskih reakcija, ponašanje elektroda u različitim puferima, te ograničenja i problemi vezani za elektrokemijsko ponašanje. Kao najoptimalniji sustav za određivanje katehina, na osnovu analize, isprofilirale su se elektrode modificirane s ugljikovim nanocijevčicama u Britton-Robinson puferu, pri pH vrijednosti 3,6 i ErGO u otopini modela vina.
Abstract (english)
In this diploma thesis, a modification of a glassy carbon electrode with different carbon nanomaterials as modifications (graphene, electrochemically reduced graphene oxide, single-walled carbon nanoparticles and multi-walled carbon nanoparticles) was investigated. The electrochemical behavior of modified and electrochemically functionalized electrodes in the presence of catechin in three different buffers (acetate buffer, Britton-Robinson buffer and wine solution model) and at different pH values (2.6- 3.6 in Britton-Robinson buffer) was examined. The electrochemical behavior of catechin was determined in different buffers by cyclic voltammetry and electrochemical impedance spectroscopy (EIS) methods. The influence of different number of cycles is shown, as well as the dependance of the height of the anode current peak on the shear rate and its root in different pH values. A significant dependance of the electrochemical behavior of catechin on modified electrodes was observed depending on the buffer in which the measurments were performed. After the measurments were done, the mechanism of electrochemical reactions, the behavior of the electrodes in different buffers, the limitations and problems related to electrochemical behavior were explained. Based on analysis, as the most optimal system for the determination of catechin, electrodes modified with carbon nanotubes in Britton-Robinson buffer, at pH 3.6 and ErGO in the model wine solution were profiled.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:167:698567
Study programmeTitle: Chemistry; specializations in: Environmental Protection, Organic Chemistry and Biochemistry
Course: Environmental Protection
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
RepositoryRepository of the Faculty of chemistry and technology
Created on2020-12-11 07:28:57