title: Authentication of canned fish packing oils by means of Fourier transform infrared spectroscopy.
abstract: The authentication of packing oil from commercial canned tuna and other tuna-like fish species was examined by means of attenuated total reflection Fourier transform infrared spectroscopy (ATR-FTIR) and chemometrics. Using partial least squares discriminant analysis (PLS-DA), it was possible to differentiate olive oil from seed oils. Discrimination of olive oil from high-oleic sunflower oil was possible, despite the latter having a degree of unsaturation more similar to olive oil than to sunflower oil. However, in the samples analyzed, sunflower oil could not be differentiated clearly from those labeled with the generic term "vegetable oil". Furthermore, the authentication of extra virgin olive oil, although more difficult, could be achieved using ATR-FTIR spectroscopy. The method could be applied regardless of fish type, without interference from fish lipids.
authors.affiliation: Department of Physical and Analytical Chemistry, Universidad de Jaén, Campus Las Lagunillas, E-23071 Jaén, Spain.
authors.forename: Ana
authors.initials: A
authors.lastname: Dominguez-Vidal
authors.affiliation: Department of Physical and Analytical Chemistry, Universidad de Jaén, Campus Las Lagunillas, E-23071 Jaén, Spain.
authors.forename: Jaime
authors.initials: J
authors.lastname: Pantoja-de la Rosa
authors.affiliation: Department of Analytical Chemistry, Universidad de Granada, c/Fuentenueva s.n., E-18071 Granada, Spain.
authors.forename: Luis
authors.initials: L
authors.lastname: Cuadros-Rodríguez
authors.affiliation: Department of Physical and Analytical Chemistry, Universidad de Jaén, Campus Las Lagunillas, E-23071 Jaén, Spain. Electronic address: mjayora@ujaen.es.
authors.forename: María José
authors.initials: MJ
authors.lastname: Ayora-Cañada
mesh_terms: D000818:Animals; D005399:Fishes / Q000382:microbiology*; D005506:Food Contamination / Q000032:analysis*; D000069463:Olive Oil; D010938:Plant Oils; D017550:Spectroscopy, Fourier Transform Infrared / Q000379:methods*
chemical_list: D000069463:Olive Oil; D010938:Plant Oils
keywords: Canned fish; High-oleic sunflower oil; Infrared spectroscopy; Olive oil; Tuna fish; Vegetable oil