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master's thesis
Elektrokemijska karakterizacija serotonina
2023. urn:nbn:hr:182:985745
Jelavić, Ivana
Josip Juraj Strossmayer University of Osijek
Department of Chemistry
Department of General, Inorganic and Physical Chemistry and Methodology of Chemistry

Cite this document

Jelavić, I. (2023). Elektrokemijska karakterizacija serotonina (Master's thesis). Osijek: Josip Juraj Strossmayer University of Osijek, Department of Chemistry. Retrieved from https://urn.nsk.hr/urn:nbn:hr:182:985745

Jelavić, Ivana. "Elektrokemijska karakterizacija serotonina." Master's thesis, Josip Juraj Strossmayer University of Osijek, Department of Chemistry, 2023. https://urn.nsk.hr/urn:nbn:hr:182:985745

Jelavić, Ivana. "Elektrokemijska karakterizacija serotonina." Master's thesis, Josip Juraj Strossmayer University of Osijek, Department of Chemistry, 2023. https://urn.nsk.hr/urn:nbn:hr:182:985745

Jelavić, I. (2023). 'Elektrokemijska karakterizacija serotonina', Master's thesis, Josip Juraj Strossmayer University of Osijek, Department of Chemistry, accessed 22 January 2025, https://urn.nsk.hr/urn:nbn:hr:182:985745

Jelavić I. Elektrokemijska karakterizacija serotonina [Master's thesis]. Osijek: Josip Juraj Strossmayer University of Osijek, Department of Chemistry; 2023 [cited 2025 January 22] Available at: https://urn.nsk.hr/urn:nbn:hr:182:985745

I. Jelavić, "Elektrokemijska karakterizacija serotonina", Master's thesis, Josip Juraj Strossmayer University of Osijek, Department of Chemistry, Osijek, 2023. Available at: https://urn.nsk.hr/urn:nbn:hr:182:985745

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Metadata
TitleElektrokemijska karakterizacija serotonina
Title (english)Electrochemical characterization of serotonin
AuthorIvana Jelavić
MentorMartina Medvidović-Kosanović (mentor)
MentorAnamarija Stanković (komentor)
Committee memberTomislav Balić (predsjednik povjerenstva)
Committee memberMartina Medvidović-Kosanović (član povjerenstva)
Committee memberAnamarija Stanković (član povjerenstva)
GranterJosip Juraj Strossmayer University of Osijek
Department of Chemistry
(Department of General, Inorganic and Physical Chemistry and Methodology of Chemistry)
Osijek
Defense date and country2023-10-18, Croatia
Scientific / art field,
discipline and subdiscipline		NATURAL SCIENCES
Chemistry
Physical Chemistry
Abstract
Glavni cilj istraživanja bio je ispitati elektrokemijska svojstva serotonina u dva otapala uporabom cikličke i difrencijalne pulsne voltametrije. Ispitan je utjecaj pH, brzine polarizacije elektrode i koncentracije serotonina na njegova oksido-redukcijska svojstva te istražiti moguću adsorpciju serotonina na površinu radne elektrode. Cikličkom voltametrijom utvrđen je porast potencijal a i struj e oksidacijskog strujnog vrha s povećanjem brzine polarizacije elektrode , te da je takav proces difuzijski kontroliran dok je proces redukcije pod miješanom adsorpcijskom i difuzijskom kontrolom D iferencijalnom pulsnom voltametrijo m utvrđeno je kako sukcesivnim snimanjem voltamograma opada visina oksidacijskog strujnog vrha serotonina što ukazuje da se oksidacijski produkt serotonina adsorbira na površinu radne elektrode Osim toga, utvrđene su i pH vrijednosti za oksidaciju serotonina u etanolnoj otopini pri pH=9 te vodenoj otopini pri pH=5. Također je utvrđeno da visina oksidacijskog strujnog vrha raste s porastom koncentracije te da struja oksidacijskog strujnog vrha linearno ovisi o koncentraciji u koncentracijskom području od 110-6 mol dm-3 do 1 ⸱ 10 4 mol dm 3 za alkoholnu otopinu serotonina te od 110-6 mol dm-3 do 9 ⸱ 10 5 mol dm 3 za vodenu otopinu serotonina.
Abstract (english)
The main aim of the research was to investigate the electrochemical properties of serotonin in two solvents using cyclic and differential pulse voltammetry. The influence of pH, speed of electrode polarization and concentration of serotonin on its redox properties was investigated and the possible adsorption of serotonin on the surface of the working electrode was investigated. Cyclic voltammetry showed an increase in the potential and current peak with increasing electrode polarization speed, and such a process is under mixed adsorption and diffusion control. By means of differential pulse voltammetry, it was determined that the height of the oxidation current peak of serotonin decreases with successive recording of the voltammogram, which indicates that the oxidation product of serotonin is adsorbed on the surface of the working electrode. In addition, the pH values for the oxidation of serotonin in an ethanol solution at pH=9 and in an aqueous solution at pH=5 were determined. It was also determined that the height of the oxidation current peak increases with increasing concentration and that the current of the oxidation current peak depends linearly on the concentration in the concentration range from 1⸱ 10-6 mol dm-3 to 1⸱ 10-4 dm-3 for an alcoholic solution of serotonin and from 1∙10-6 mol dm-3 to up to 9 10-5 mol dm-3 for aqueous solution of serotonin. Thesis
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:182:985745
Study programmeTitle: University Graduate Study of Chemistry; Research Program; specializations in: Research Program
Course: Research Program
Study programme type: university
Study level: graduate
Academic / professional title: sveučilišni/a magistar/magistra kemije (sveučilišni/a magistar/magistra kemije)
Type of resourceText
File originBorn digital
Access conditionsOpen access
Terms of useLicence In copyright icon
Created on2023-11-06 12:38:10