Independent components analysis coupled with 3D-front-face fluorescence spectroscopy to study the interaction between plastic food packaging and olive oil

Amine Kassouf (1, 2) , Maria El Rawke (1, 2) , Hanna Chebib (2) , Violette Ducruet (1) , Douglas Rutledge (1) , Jacqueline Maalouly (2)

1 GENIAL - Ingénierie Procédés Aliments
2 ER004 - Lebanese Food Packaging [Université libanaise]

Olive oil is one of the most valued sources of fats in the Mediterranean diet. Its storage was generally done using glass or metallic packaging materials. Nowadays, plastic packaging has gained worldwide spread for the storage of olive oil. However, plastics are not inert and interaction phenomena may occur between packaging materials and olive oil. In this study, extra virgin olive oil samples were submitted to accelerated interaction conditions, in contact with polypropylene (PP) andpolylactide (PLA)plastic packaging materials. 3D-front-face fluorescence spectroscopy, being a simple, fast and non destructive analytical technique, was used to study this interaction. Independent components analysis (ICA) was used to analyze raw 3D-front- face fluorescence spectra of olive oil. ICA was able to highlight a probable effect of a migration of substances with antioxidant activity. The signals extracted by ICA corresponded to natural olive oil fluorophores (tocopherols and polyphenols)as well as newly formed ones which were tentatively identified asfluorescent oxidation products. Based on the extracted fluorescent signals, olive oil in contact with plastics had slower aging rates in comparison with reference oils. Peroxide and free acidity values validated the results obtained by ICA, related to olive oil oxidation rates. Sorbed olive oil in plastic was also quantified given that this sorption could induce a swelling of the polymer thus promoting migration.

Mots clés: migration; packaging; emballage; olive oil; ICA; 3D front face fluorescence spectroscopy; sorption; plastic packaging; 3D-front-face fluorescence spectroscopy; independent components analysis

Domaines: Chimie analytique; Ingénierie des aliments

Amine Kassouf, Maria El Rawke, Hanna Chebib, Violette Ducruet, Douglas Rutledge, et al.. Independent components analysis coupled with 3D-front-face fluorescence spectroscopy to study the interaction between plastic food packaging and olive oil. Analytica Chimica Acta, 2014, 839, pp.14-25. ⟨10.1016/j.aca.2014.06.035⟩. ⟨hal-01186901⟩