Naslov
High-pressure technologies as promising green methods for extraction of cocoa shell

Autori
Gagić, Tanja ; Jokić, Stela ; Knez, Željko ; Škerget, Mojca

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
Book of abstracts 17th Ružička Days "Today Science - Tomorrow Industry" / Tomas, Srećko ; Ačkar, Đurđica - Osijek : Josip Juraj Strossmayer University of Osijek Faculty of Food Technology Osijek ; Croatian Society of Chemical Engineers (CSCE), 2018, 52-52

ISBN
978-953-7005-57-3

Skup
17. Ružičkini dani "Danas znanost - sutra industrija"

Mjesto i datum
Vukovar, Hrvatska, 19.09.2018. - 21.09.2018

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Cocoa shell ; extraction ; subcritical water ; supercritical CO2

Sažetak
Cocoa shell represents a waste from the industrial production of cocoa and chocolate. However, it attracts a lot of attention because it is rich in valuable compounds. Re-use of cocoa shell won’t increase only profitability and avoid environmental pollution, it could also found application in cosmetic, pharmaceutical and food industry due to its antioxidant, antimicrobial, anti-ageing, anti- radical and anticarcinogenic properties. Different methods were used for extraction of cocoa shell, but the data related to the use of green separation techniques are limited in the literature. Therefore, the aim of this work was to use both green-based and conventional extraction methods in order to compare results. Supercritical CO2 extraction was performed at pressures of 200 and 300 bar and at temperatures 40, 60 and 80 ˚C. Subcritical water extraction was carried out in a batch reactor at temperatures of 170 ˚C and 220 ˚C treating raw material and residues from CO2 extraction. Soxhlet extraction with hexane and extraction with 50 % acetone were also performed. Total phenol content, total proanthocyanidin content and antioxidant activity of extracts were determined. Besides phenolic compounds, some extracts contained high amounts of theobromine, followed by caffeine and traces of theophyline. Furthermore, subcritical water extracts were rich in sugars and their derivatives such as: maltose, glucose, xylose, arabinose, rhamnose, fucose, 5-HMF, furfural, levulinic and formic acids. Fatty acids (oleic, palmitic, stearic, linoleic and palmitoleic acids) were also obtained using supercritical CO2 and Soxhlet extraction of cocoa shell and were analysed by gas chromatography.

Izvorni jezik
Engleski

Znanstvena područja
Kemijsko inženjerstvo, Biotehnologija

POVEZANOST RADA