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Comparison of extraction methods for analysis of flavonoids in onions

Soeltoft, Malene; Knuthsen, Pia and Nielsen, John (2008) Comparison of extraction methods for analysis of flavonoids in onions. In: Polyphenol Communications, 1.

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Summary

Onions are known to contain high levels of flavonoids and a comparison of the efficiency, reproducibility and detection limits of various extraction methods has been made in order to develop fast and reliable analytical methods for analysis of flavonoids in onions.
Conventional and classical methods are time- and solvent-consuming and the presence of light and oxygen during sample preparation facilitate degradation reactions. Thus, classical methods were compared with microwave (irradiation) extraction, ultrasonic liquid extraction and accelerated solvent extraction.


EPrint Type:Conference paper, poster, etc.
Type of presentation:Poster
Subjects: Crop husbandry > Production systems
Food systems > Food security, food quality and human health
Research affiliation: Denmark > DARCOF III (2005-2010) > ORGTRACE - Organic food and health
Denmark > DTU - Technical University of Denmark
Deposited By: Knuthsen, Senior scientist Pia
ID Code:19814
Deposited On:30 Nov 2011 13:00
Last Modified:01 Dec 2011 07:12
Document Language:English
Status:Published
Refereed:Peer-reviewed and accepted

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