Naslov
The impact of novel extraction techniques on the polyphenol profile of grape pomace

Autori
Lončarić, Ante ; Jozinović, Antun ; Jozinović Lešić, Antonija ; Kojić, Nebojša ; Šubarić, Drago

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

Izvornik
Abstract of the 11th International Scientific and Professional Conference / Jerković, Igor ; Šubarić, Drago ; Jašić, Midhat - Split : Osijek : Tuzla, 2018, 110-110

ISBN
978-953-7005-58-0

Skup
11th International Scientific and Professional Conference „With food to health“ = 11. međunarodni znanstveno-stručni skup Hranom do zdravlja

Mjesto i datum
Split, Hrvatska, 18.10.2018. - 19.10.2018

Vrsta sudjelovanja
Poster

Vrsta recenzije
Podatak o recenziji nije dostupan

Ključne riječi
cold plasma, ultrasound, grape pomace, polyphenol profile

Sažetak
The impact of cold atmospheric plasma (CAP) and ultrasound (US) assisted extraction on gallic acid, p-coumaric acid, catechin, epicatechin and quercitin from dried grape pomace was investigated. The solvents used for the extraction were aqueous solution of ethanol or methanol, acidified with hydrochloric acid (49.5:49.5:1). The investigated parameters in case of CAP were tretment time (5, 10, 15 min) and frequency (20, 50, 100 Hz), and in the case of US, treatment time (5, 10, 15 min) and temperature (20, 40, 80°C). The results showed that in both cases the better extraction solvent was ethanol acidified with hydrochloric acid. The highest yields in extracts obtained by CAP assisted extraction have been achieved by extracting polyphenols at 100 Hz for 15 min. The contents of gallic acid, p-coumaric acid, caffeic acid, catechin, epicatechin and quercetin were 4.21 ; 6.80 ; 54.09 ; 53.68 ; 53.19 ; 45.31 mg/100g DW, respectively. In extracts obtained by US assisted extraction, the highest content of investigated polyphenols have been achieved by extracting polyphenols at 80 °C for 15 min. The contents of gallic acid, p-coumaric acid, caffeic acid, catechin, epicatechin and quercetin were 2.32 ; 5.87 ; 36.19 ; 40.25 ; 23.02 ; 24.97 mg/100g DW, respectively. Contents of all investigated polyphenols were higher in extracts obtained by CAP assisted extraction.

Izvorni jezik
Engleski

Znanstvena područja
Prehrambena tehnologija

POVEZANOST RADA