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master's thesis
Usporedba ispitivanja antioksidansa u vinu elektrokemijskom metodom cikličke voltametrije i kemijskim metodama
Zagreb: University of Zagreb, Faculty of Chemical Engineering and Technology, 2019. urn:nbn:hr:149:996550
Kelava, Ivan Aleksandar
University of Zagreb
Faculty of Chemical Engineering and Technology

Institutional repository: Repository of Faculty of Chemical Engineering and Technology University of Zagreb

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Kelava, I. A. (2019). Usporedba ispitivanja antioksidansa u vinu elektrokemijskom metodom cikličke voltametrije i kemijskim metodama (Master's thesis). Zagreb: University of Zagreb, Faculty of Chemical Engineering and Technology. Retrieved from https://urn.nsk.hr/urn:nbn:hr:149:996550

Kelava, Ivan Aleksandar. "Usporedba ispitivanja antioksidansa u vinu elektrokemijskom metodom cikličke voltametrije i kemijskim metodama." Master's thesis, University of Zagreb, Faculty of Chemical Engineering and Technology, 2019. https://urn.nsk.hr/urn:nbn:hr:149:996550

Kelava, Ivan Aleksandar. "Usporedba ispitivanja antioksidansa u vinu elektrokemijskom metodom cikličke voltametrije i kemijskim metodama." Master's thesis, University of Zagreb, Faculty of Chemical Engineering and Technology, 2019. https://urn.nsk.hr/urn:nbn:hr:149:996550

Kelava, I. A. (2019). 'Usporedba ispitivanja antioksidansa u vinu elektrokemijskom metodom cikličke voltametrije i kemijskim metodama', Master's thesis, University of Zagreb, Faculty of Chemical Engineering and Technology, accessed 04 November 2024, https://urn.nsk.hr/urn:nbn:hr:149:996550

Kelava IA. Usporedba ispitivanja antioksidansa u vinu elektrokemijskom metodom cikličke voltametrije i kemijskim metodama [Master's thesis]. Zagreb: University of Zagreb, Faculty of Chemical Engineering and Technology; 2019 [cited 2024 November 04] Available at: https://urn.nsk.hr/urn:nbn:hr:149:996550

I. A. Kelava, "Usporedba ispitivanja antioksidansa u vinu elektrokemijskom metodom cikličke voltametrije i kemijskim metodama", Master's thesis, University of Zagreb, Faculty of Chemical Engineering and Technology, Zagreb, 2019. Available at: https://urn.nsk.hr/urn:nbn:hr:149:996550

Metadata
TitleUsporedba ispitivanja antioksidansa u vinu elektrokemijskom metodom cikličke voltametrije i kemijskim metodama
Title (english)Comparison of wine antioxidant testing by the electrochemical method of cyclic voltammetry and by chemical methods
AuthorIvan Aleksandar Kelava
MentorSanja Martinez (mentor)
Committee memberSanja Martinez (predsjednik povjerenstva)
Committee memberMarijana Kraljić Roković (član povjerenstva)
Committee memberLidija Furač (član povjerenstva)
GranterUniversity of Zagreb
Faculty of Chemical Engineering and Technology
Zagreb
Defense date and country2019-07-12, Croatia
Scientific / art field,
discipline and subdiscipline		NATURAL SCIENCES
Chemistry
Abstract
U ovom radu ispitano je deset uzoraka vina hrvatskih proizvođača metodom cikličke voltametrije u fosfatnom puferu. Staklena ugljična elektroda korištena je kao radna elektroda, a antioksidacijski kapacitet određen ovom metodom uspoređen je s antioksidacijskim kapacitetom određenim kemijskim metodama: FRAP, ABTS i DPPH. Askorbinska kiseline, koja ima sličan mehanizam oksidacije kao i polifenolni spojevi niže molekulske mase koji u svojoj strukturi sadrže orto-dihidroksi fenolnu skupinu, korištena je kao standard za određivanje antioksidacijskog kapaciteta uzoraka vina kemijskim i elektrokemijskim metodama. Antioksidacijski kapacitet iskazan je kao ekvivalent askorbinske kiseline, izražen u jedinicama mmol AAE / 100 g uzorka. Postignuta je pozitivna, srednje jaka korelacija antioksidacijskog kapaciteta između ispitanih metoda. Kod svih metoda određivanja crna vina pokazala su značajno više vrijednosti antioksidacijskog kapaciteta u odnosu na bijela i ružičasta vina.
Abstract (english)
This work examined ten samples of wines of Croatian producers' with the cyclic voltammetry method in phosphate buffer. The glassy carbon electrode was used as a working electrode, and the antioxidant capacity determined by this method was compared with the antioxidant capacity determined by the following chemical methods: FRAP, ABTS and DPPH. Ascorbic acid, having a mechanism of oxidation similar to the lower molecular weight polyphenolic compounds which contain ortho-dihydroxy phenol group in their structure, was used as a standard for determining the antioxidant capacity of wine samples by chemical and electrochemical methods. Antioxidant capacity is given in the equivalents of ascorbic acid and expressed in units of mmol AAE / 100 g sample. A positive correlation of medium strength was found between antioxidant capacities obtained by the tested methods. In all tested methods, black wines have shown significantly higher values of antioxidant capacity compared to white and pink wines.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:149:996550
Study programmeTitle: Applied Chemistry - Graduate study; specializations in: Environmental chemistry and green technologies, Advanced materials and technologies, Applied organic chemistry
Course: Advanced materials and technologies
Study programme type: university
Study level: graduate
Academic / professional title: magistar/magistra primijenjene kemije (magistar/magistra primijenjene kemije)
Type of resourceText
File originBorn digital
Access conditionsAccess restricted to students and staff of home institution
Terms of useLicence In copyright icon
Created on2022-02-21 15:00:40