Naslov
AQUEOUS TWO-­PHASE EXTRACION OF POLYPHENOLS FROM RED AND WHITE WINE IN A MICROEXTRACTOR

Autori
Šalić, Anita ; Jurinjak Tušek, Ana ; Zelić Bruno

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
Book of abstracts "Natural resources, green technology and sustainable development" / Cvjetko Bubalo, Marina ; Radojčić Redovniković, Ivana ; Jakovljević, Tamara ; Vuković, Mladen ; Erdec Hendrih ; Dina - Zagreb : Prehrambeno-biotehnološki fakultet Sveučilišta u Zagrebu, 2014, 107-111

ISBN
978-953-6893-04-1

Skup
Natural resources, green technology and sustainable development

Mjesto i datum
Zagreb, Hrvatska, 26.11.2014. - 28.11.2014

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
aqueous two phase system; microextractor; polyphenols; red and with wine

Sažetak
Extraction of polyphenols is traditionally performed using organic solvents e.g. methanol, ethanol, acetone, dimethylformamide etc. Application of these solvents results in efficient extraction but the extracts are not safe for human consumption due to the potential effect of toxic solvent. Additionally, organic solvents can disrupt the polyphenol structure and reduce their activity, used organic solvent require special care for disposal and represent possible source of pollution. To eliminate the described problems aqueous two-phase system containing PEG6000-H2O-(NH4)2SO4 was used in this investigation for extraction of polyphenols. Under optimal operating conditions published elsewhere (Šalić et al. 2011) continuous extraction of polyphenols from red and white wine was performed in microextractor system. Microextractor system was composed of two microchips connected in series. The first one was equipped with micromixers for mixing at high Reynolds numbers, while the second one was the tubular microchip. The first microchip was used for homogenisation of two aqueous phases and the second one for the phase separation. Total working volume of described microextraction system was V = 8 mm3. The obtained results indicate that aqueous two-phase system can be successfully used of extraction of polyphenols from red and white wine in microextractor. The obtained mass transfer rate for the microextraction system was two orders of magnitude higher that those achieved in conventional batch and continuous macroextraction system.

Izvorni jezik
Engleski

Znanstvena područja
Biotehnologija

POVEZANOST RADA