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Study of the parameters influencing the migration of organic and inorganic contaminants from metallic packaging into food consumed in Lebanon

Abstract : Tinplate cans represent an important source of food contaminants due to their multi-materials structure. Endocrine disrupting chemicals can migrate from the organic coating, whereas metal trace elements may be released from metal substrate. This issue has be extensively studied worldwide, yet, data relative to canned food from the Lebanese market are scarce, although Lebanese cuisine is appreciated globally with annual exportation of canned food. So, this work investigates the effect of several parameters on the migration of bisphenol compounds (bisphenol A and F, bisphenol A and F diglycidyl ethers and their derivatives) and metal trace elements (Fe, Sn, Pb, Cd, Cr, Ni, Zn, Cu) from tinplate cans into canned foods consumed in Lebanon. Sterilization, storage conditions, food product properties and inappropriate handling of canned food have been studied. Different analytical methods were validated and applied. Liquid chromatography with fluorescence detection (and mass spectrometry confirmation) was useful for studying the migration of bisphenol compounds in foods and their simulants. Metal elements were analyzed using atomic absorption spectrometry after microwave-assisted digestion of canned foods. Among target bisphenol compounds, only BPA and BADGE.2H2O were detected in the studied foods/food simulants. Empirical models were built and validated, based on response surface methodology, to predict the influence of sterilization and storage on their migration into food simulants. In addition, principal component analysis was used to examine the correlation between the content of targeted contaminants and the studied influencing parameters. Their levels drastically increased upon sterilization (121°C), where the majority of bisphenol residues have migrated. Consequently, the migration of bisphenol compounds was not influenced by storage time (until shelf life) and temperature; the only significant effect was noticed in pasteurized canned okra (100°C). Most ofBPA (12.3-197 μg/kg) and BADGE.2H2O (101-1106 μg/kg) levels comply with the European recommended limits; yet, BPA in some cases exceeded its recently revised limit (50 μg/kg). All target metals were found, with increased levels upon storage. Storage temperature had an important impact on the release of metals. In particular, 40°C (storage in hot areas) should be avoided, especially for uncoated cans holding acidic food (e.g. fruits) since serious corrosion occurred within 2 to 5 months, releasing large amounts of Fe and Sn. Storing food cans under refrigerating temperature can successfully limit the migration of metal elements during early storage time. Thus it is advisable to purchase fresh and refrigerated canned foods. Another recommendation is to discard dented cans, since high release of metal elements is observed. Among inappropriate practices, keeping opened uncoated fruit cans in the fridge can cause threatening release of Sn and Fe.
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Submitted on : Thursday, October 21, 2021 - 7:56:12 PM
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  • HAL Id : tel-03392433, version 1

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Sara Noureddine Elmoussawi. Study of the parameters influencing the migration of organic and inorganic contaminants from metallic packaging into food consumed in Lebanon. Food engineering. Institut agronomique, vétérinaire et forestier de France; Université libanaise. Faculté des sciences II (Fanar, Liban), 2018. English. ⟨NNT : 2018IAVF0030⟩. ⟨tel-03392433⟩

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