Journal
JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE
Volume 94, Issue 7, Pages 1340-1348Publisher
WILEY
DOI: 10.1002/jsfa.6417
Keywords
Fourier transform infrared spectroscopy (FTIR); omega-3; sea bass (Dicentrarchus labrax); docosahexaenoic (DHA); di-unsaturated omega-6 (linoleic); origin differentiation
Funding
- Spanish Ministry of Science and Innovation (MICINN) [AGL2009-09904, AGL2012-36466]
- Basque Government (EJ-GV) [GIC10/85-IT-463-10]
- University of the Basque Country (UPV/EHU) [UFI-11/21]
- MICINN
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BACKGROUND The lipids of 16 farmed and wild European sea bass (Dicentrarchus labrax) samples were studied by Fourier transform infrared (FTIR) spectroscopy. The spectroscopic parameters which would be useful when distinguishing between both fish origins were analysed. RESULTS It was shown, for the first time, that the frequency and the ratio between the absorbance of certain bands are efficient and reliable authentication tools for the origin of sea bass. Furthermore, relationships between infrared data and fish lipids composition referring to the molar percentage or concentration of certain acyl groups were also studied. It was proved that some infrared spectroscopic data (the frequency of certain bands or the ratio of the absorbance of others), are very closely related to the composition of sea bass lipids. It was shown for the first time that certain infrared spectroscopic data could predict, with a certain degree of approximation, the molar percentage, or concentration, of omega-3, docosahexaenoic (DHA) and di-unsaturated omega-6 (linoleic) in sea bass lipids. CONCLUSION The consistency of the results confirms the usefulness of FTIR spectroscopy to detect frauds regarding sea bass origin, and to provide important compositional data about sea bass lipids from the nutritional and technological point of view. (c) 2013 Society of Chemical Industry
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