Fourier transform infrared spectroscopy  as a tool to study farmed and wild sea bass lipid  composition.
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.


CONCLUSIONS
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.
Natalia P
NP
Vidal
Encarnación
E
Goicoechea
María J
MJ
Manzanos
María D
MD
Guillén
D000818:Animals; D000835:Animals, Wild / Q000254:growth & development* / Q000378:metabolism; D017756:Aquaculture; D001492:Bass / Q000254:growth & development* / Q000378:metabolism; D004041:Dietary Fats / Q000032:analysis* / Q000302:isolation & purification / Q000378:metabolism; D004281:Docosahexaenoic Acids / Q000032:analysis / Q000096:biosynthesis; D017598:Efficiency, Organizational; D005513:Food Inspection / Q000379:methods*; D005515:Food Labeling; D055951:Functional Food / Q000032:analysis* / Q000191:economics; D019787:Linoleic Acid / Q000032:analysis / Q000096:biosynthesis; D018482:Muscle, Skeletal / Q000737:chemistry; D015203:Reproducibility of Results; D017747:Seafood / Q000032:analysis* / Q000191:economics; D012621:Seasons; D013030:Spain; D017550:Spectroscopy, Fourier Transform Infrared; D014020:Tissue Extracts / Q000737:chemistry / Q000378:metabolism
D004041:Dietary Fats; D014020:Tissue Extracts; D004281:Docosahexaenoic Acids; D019787:Linoleic Acid