Onion waste as a rich source of antioxidants for meat products

0510603 - ÚVGZ 2020 RIV CZ eng J - Journal Article
Bedrníček, J. - Laknerová, I. - Linhartová, I. - Kadlec, J. - Samková, E. - Bárta, J. - Bártová, V. - Mráz, J. - Pešek, M. - Winterová, R. - Vrchotová, Naděžda - Tříska, Jan - Smetana, P.
Onion waste as a rich source of antioxidants for meat products.
Czech Journal of Food Sciences. Roč. 37, č. 4 (2019), s. 268-275. ISSN 1212-1800. E-ISSN 1805-9317
R&D Projects: GA MŠMT(CZ) LO1415
Research Infrastructure: CzeCOS II - 90061
Institutional support: RVO:86652079
Keywords : Antioxidant * lc/ms * Onion skin * Pork patties
OECD category: Food and beverages
Impact factor: 0.932, year: 2019
Method of publishing: Open access
https://www.agriculturejournals.cz/web/cjfs.htm?type=article&id=68_2018-CJFS

Onion skin is a waste produced in thousands of tons annually in the European Union. It is a rich natural source of flavonoids and its water extracts (as an environmentally friendly solvent) could be used as an antioxidant material for meat products. Therefore, antioxidant properties of onion skin water extracts (OSWEs) were tested on cooked pork patties. Pork patties were divided into five treatments: control (no antioxidant), 10 and 20% (w/w) of yellow OSWE, and 10 and 20% (w/w) of red OSWE. Antioxidant activity, total polyphenols, thiobarbituric acid reactive substances (TBARS), and sensory analysis were assessed. Patties with added antioxidants showed significantly (P < 0.05) higher antioxidant activity and total polyphenol content. Samples with OSWEs, after 5-day storage (5°C), had significantly (P < 0.05) lower TBARS values compared to control. Two main phenolic compounds were identified in OSWEs by liquid chromatography – mass spectrometry using electrospray ionisation in negative mode: quercetin (m/z 301) and quercetin monoglucoside (m/z 463). OSWEs demonstrated the potential to be used as a source of natural antioxidants with strong antioxidant activity in meat products.
Permanent Link: http://hdl.handle.net/11104/0301033