Refereed journal article or data article (A1)

Evaluation of the composition and oxidative status of omega-3 fatty acid supplements on the Finnish market using NMR and SPME-GC–MS in comparison with conventional methods




List of Authors: Damerau Annelie, Ahonen Eija, Kortesniemi Maaria, Puganen Anna, Tarvainen Marko, Linderborg Kaisa M.

Publisher: Elsevier BV

Publication year: 2020

Journal: Food Chemistry

Volume number: 330

Number of pages: 11

ISSN: 0308-8146

eISSN: 1873-7072

DOI: http://dx.doi.org/10.1016/j.foodchem.2020.127194

URL: https://www.sciencedirect.com/science/article/pii/S0308814620310566?via%3Dihub

Self-archived copy’s web address: https://research.utu.fi/converis/portal/detail/Publication/48829568


Abstract

Previous studies disagree on the oxidative status of omega-3 supplements. The great deviation raises concerns about quality and the methods used to monitor it. This study investigated 49 omega-3 products for their fatty acid content, lipid class and oxidative status using official methods, gas and liquid chromatography with mass spectrometry and nuclear magnetic resonance spectroscopy. With minor deviations, omega-3 fatty acid content and lipid class of all products were as declared. 24% of studied products exceeded thresholds set by The Global Organization for EPA and DHA Omega-3s for peroxide and/or p-anisidine value suggesting a compromised oxidative status. However, peroxide and/or p-anisidine value were only suitable for detection of lipid oxidation in 90% or 73%, respectively, of the products. Analysis of volatile oxidation compounds can be an alternative method for p-anisidine value. Nuclear magnetic resonance spectroscopy was shown to be a rapid method for determination of oil type and lipid class.


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Last updated on 2022-07-04 at 17:57