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master's thesis
Ekstrakcija polifenola primjenom vodenog dvofaznog sustava s eutektičkim otapalom u makro- i mikroekstraktoru
Zagreb: University of Zagreb, Faculty of Food Technology and Biotechnology, 2019. urn:nbn:hr:159:677471
Milićević, Nela
University of Zagreb
Faculty of Food Technology and Biotechnology
Department of Process Engineering
Laboratory for Measurement, Regulation and Automatisation

Institutional repository: Repository of the Faculty of Food Technology and Biotechnology

Cite this document

Milićević, N. (2019). Ekstrakcija polifenola primjenom vodenog dvofaznog sustava s eutektičkim otapalom u makro- i mikroekstraktoru (Master's thesis). Zagreb: University of Zagreb, Faculty of Food Technology and Biotechnology. Retrieved from https://urn.nsk.hr/urn:nbn:hr:159:677471

Milićević, Nela. "Ekstrakcija polifenola primjenom vodenog dvofaznog sustava s eutektičkim otapalom u makro- i mikroekstraktoru." Master's thesis, University of Zagreb, Faculty of Food Technology and Biotechnology, 2019. https://urn.nsk.hr/urn:nbn:hr:159:677471

Milićević, Nela. "Ekstrakcija polifenola primjenom vodenog dvofaznog sustava s eutektičkim otapalom u makro- i mikroekstraktoru." Master's thesis, University of Zagreb, Faculty of Food Technology and Biotechnology, 2019. https://urn.nsk.hr/urn:nbn:hr:159:677471

Milićević, N. (2019). 'Ekstrakcija polifenola primjenom vodenog dvofaznog sustava s eutektičkim otapalom u makro- i mikroekstraktoru', Master's thesis, University of Zagreb, Faculty of Food Technology and Biotechnology, accessed 29 November 2024, https://urn.nsk.hr/urn:nbn:hr:159:677471

Milićević N. Ekstrakcija polifenola primjenom vodenog dvofaznog sustava s eutektičkim otapalom u makro- i mikroekstraktoru [Master's thesis]. Zagreb: University of Zagreb, Faculty of Food Technology and Biotechnology; 2019 [cited 2024 November 29] Available at: https://urn.nsk.hr/urn:nbn:hr:159:677471

N. Milićević, "Ekstrakcija polifenola primjenom vodenog dvofaznog sustava s eutektičkim otapalom u makro- i mikroekstraktoru", Master's thesis, University of Zagreb, Faculty of Food Technology and Biotechnology, Zagreb, 2019. Available at: https://urn.nsk.hr/urn:nbn:hr:159:677471

Metadata
TitleEkstrakcija polifenola primjenom vodenog dvofaznog sustava s eutektičkim otapalom u makro- i mikroekstraktoru
Title (english)Extraction of pholyphenols using the aquaeous two-phase system with eutectic solvent in macro- and microextractor
AuthorNela Milićević
MentorAna Jurinjak Tušek (mentor)
GranterUniversity of Zagreb
Faculty of Food Technology and Biotechnology
(Department of Process Engineering)
(Laboratory for Measurement, Regulation and Automatisation)
Zagreb
Defense date and country2019-07-15, Croatia
Scientific / art field,
discipline and subdiscipline		BIOTECHNICAL SCIENCES
Biotechnology
Abstract
Cilj ovoga rada bio je ispitati potencijal primjene vodenog dvofaznog sustava s eutektičkim otpalom za ekstrakciju polifenola u makro- i mikroekstraktoru. U okviru rada, na temelju učinkovitosti ekstrakcije, kao pogodno eutektičko otapalo odabran je kolin-klorid: etilen-glikol. Primjenom metode odzivnih površina procijenjeni su optimalni uvjeti za provedbu procesa ekstrakcije u šaržnom makroekstraktoru: masa DES-a od 1,25 g, koncentracija soli od 0,95 g mL-1, vrijeme ekstrakcije od 15 min, temperatura ekstrakcije od 50 °C, koncentracija galne kiseline od 60 mg L-1 te je uočeno da je temperatura varijabla koja najviše utječe na učinkovitost ekstrakcije. Pri navedenim optimalnim uvjetima provedeni su pokusi ekstrakcije u kontinuiranom mikroekstraktoru te je postignuta učinkovitost ekstrakcije od približno 94 % za vrijeme zadržavanja od 2,43 s što predstavlja značajan napredak usporedbi sa šaržnim procesom gdje je za vrijeme ekstrakcije od 15 min postignuta učinkovitost ekstrakcije od 88 %.
Abstract (english)
The aim of this work was to investigate the potential of aqueous two-phase system with eutectic solvents for extraction of polyphenols in macro- and microextractor. Based on the efficiency of the extraction, choline chloride: ethylene-glycol was selected as a suitable eutectic solvent. Using the Response surface method, the optimum conditions for the aqueous two-phase system extraction in the batch conditions were estimated (DES weight of 1.25 g, salt concentration of 0.95 g mL-1, 15 minute extraction time, extraction temperature of 50 °C, galic acid concentration of 60 mg L-1) and it was observed that the temperature is the most important variable for the extraction efficiency. Extraction experiments in a continuous microextractor were carried out at selected optimum conditions, and the extraction efficiency of the of approximately 94 % was achieved at the residence time of 2.43 s, which represents a significant improvement compared to the batch process where the extraction efficiency of 88 % was achieved for extraction time of 15 min.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:159:677471
Study programmeTitle: Bioprocess Engineering
Study programme type: university
Study level: graduate
Academic / professional title: magistar/magistra inženjer/inženjerka bioprocesnog inženjerstva (magistar/magistra inženjer/inženjerka bioprocesnog inženjerstva)
Type of resourceText
File originBorn digital
Access conditionsOpen access
Terms of useLicence In copyright icon
Created on2019-12-06 12:34:30