1H NMR spectroscopy as tool to follow changes in the fatty acids of n-3 PUFA-rich fish oils

Autor(en)

Catrin Tyl, Lothar Brecker, Karl-Heinz Wagner

Abstrakt

High-resolution NMR spectroscopy is a fast and accurate tool to measure the content of n-3 PUFA in unoxidised oils. Four types of fish oils with a high amount of n-3 PUFA were oxidised under different conditions, and the changes in their fatty acid pattern were monitored with NMR spectroscopy and compared with traditional analytical methods, especially GC. Good compliances were obtained for unoxidised oils and for oils at the early oxidation stages. Distinct changes in signals or signal ratio intensities arose only in higher-oxidised oils that were irradiated or heated in the presence of oxygen over several days. Slight differences between values obtained by GC and NMR at this point were likely caused by accumulation of oxidation products. Detection of the terminal lipid oxidation products propanal and 2-propenal was only possible at late oxidation stages.

Organisation(en)

Institut für Organische Chemie, Department für Ernährungswissenschaften

Journal

European Journal of Lipid Science and Technology

Band

110

Seiten

141-148

Anzahl der Seiten

8

ISSN

1438-7697

Publikationsdatum

02-2008

Peer-reviewed

Ja

ÖFOS 2012

303009 Ernährungswissenschaften, 104009 Lebensmittelchemie

Schlagwörter

ASJC Scopus Sachgebiete

Biotechnology, Food Science, Chemistry(all), Industrial and Manufacturing Engineering

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/1h-nmr-spectroscopy-as-tool-to-follow-changes-in-the-fatty-acids-of-n3-pufarich-fish-oils(67bf4b12-ffa1-4514-a5b0-9b842e155a0d).html