Ekstrakcija polifenola iz lista trputca

undergraduate thesis

• Title (english): Ekstraction of polyphenols from plantain leaves
• Author: Lana Rončević
• Mentor: Jasna Prlić Kardum (mentor)
• Committee member: Jasna Prlić Kardum (predsjednik povjerenstva)
• Committee member: Aleksandra Sander (član povjerenstva)
• Committee member: Dajana Kučić Grgić (član povjerenstva)
• Granter: University of Zagreb; Faculty of Chemical Engineering and Technology; Zagreb
• Defense date and country: 2021-07-09, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Chemical Engineering

Abstract

Polifenoli, koji se nalaze u namirnicama biljnog podrijetla, antioksidansi su koji pozitivno utječu na ljudsko zdravlje. Postupkom ekstrakcije izdvajaju se iz biljaka pomoću prirodnih eutektičkih otapala, koja su danas sve češće u upotrebi zbog svoje netoksičnosti, biorazgradljivosti i niske cijene. U ovom radu, od više pripremljenih različitih otapala odabrano je i korišteno prirodno eutektičko otapalo pripremljeno od mliječne kiseline, fruktoze i glicerola (La-Fru-Gly) u molarnom omjeru 2:1:2 sa različitim masenim udjelima vode. Za navedeni NADES pratila su se fizikalno-kemijska svojstva, kao što je gustoća, viskoznost, pH i polarnost. Provedena je i ekstrakcija krutina-kapljevina polifenolnih spojeva iz lista trputca pomoću navedenog NADES-a, kojom se odredila koncentracija ukupnih fenolnih spojeva. Osim toga, ispitan je utjecaj toksičnosti otapala na glavice češnjaka. Gustoća, viskoznost i polarnost se smanjuju povećanjem udjela vode, dok pH pokazuje obrnuti slučaj. Također, koncentracija fenolnih spojeva opada porastom udjelom vode.

Abstract (english)

Polyphenols, which are found in foods of plant origin, are antioxidants, which have a positive effect on human health. By the extraction process, they are extracted from plants with natural eutectic solvents, which are increasingly used today because of their non-toxicity, biodegradability and low cost. In this paper, from several different solvents prepared, it was selected and used natural eutectic solvents prepared from milk acid, fructose and glycerol in molar ration 2:1:2, with different mass fractions of water. Physical-chemical properties were monitored for the mentioned NADES, such as density, viscosity, pH and polarity. Solid-liquid extraction of polyphenolic compounds from plantain leaves was also performed using said NADES, which determined the concentration of total phenolic compounds. In addition, the effect of solvent toxicity on garlic heads was examined. Density, viscosity and polarity decrease with increasing water content, while pH shows the opposite case. Also, the concentration of phenolic compounds decreases with increasing water content.

• Keywords: trputac; polifenoli; DES; NADES; gustoća; viskoznost; pH; polarnost; ekstrakcija
• Keywords (english): plantain leaves; polyphenols; DES; NADES; density; viscosity; pH; polarity; extraction
• Language: croatian
• URN:NBN: urn:nbn:hr:149:112455
• Study programme: Title: Chemical Engineering - Undergraduate study; Study programme type: university; Study level: undergraduate; Academic / professional title: sveučilišni/a prvostupnik/ prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka kemijskog inženjerstva (sveučilišni/a prvostupnik/ prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka kemijskog inženjerstva)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access
• Created on: 2023-04-17 11:33:06