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Open AccessArticle

Dialkylketones in Paperboard Food Contact Materials—Method of Analysis in Fatty Foods and Comparative Migration into Liquid Simulants Versus Foodstuffs

1
Department of Analytical Chemistry, Nutrition and Food Science, Faculty of Pharmacy, University of Santiago de Compostela, 15782 Santiago de Compostela, Spain
2
Fraunhofer Institute for Process Engineering and Packaging (IVV), Giggenhauser Straβe 35, 85354 Freising, Germany
*
Author to whom correspondence should be addressed.
Academic Editor: Mihai Brebu
Molecules 2020, 25(4), 915; https://doi.org/10.3390/molecules25040915
Received: 31 January 2020 / Revised: 14 February 2020 / Accepted: 15 February 2020 / Published: 18 February 2020
(This article belongs to the Special Issue Food Packaging Materials)
Dialkyl diketene dimers are used as sizing agents in the manufacture of paper and board for food contact applications to increase wetting stability. Unbound residues can hydrolyze and decarboxylate into dialkylketones. These non-intentionally added substances (NIAS) have potential to migrate to fatty foods in contact with those packaging materials. In Germany, the Federal Institute for Risk Assessment (BfR) established a specific migration limit (SML) of 5 mg/kg for the transfer of these dialkylketones into foodstuffs. In order to investigate the differences between simulants and real foods, an analytical method was optimized for extraction and quantification of dialkylketones in edible oils and fatty foods by gas chromatography coupled with flame ionization detection (GC-FID), and additionally by gas chromatography with mass spectrometry (GC-MS), to confirm their identification and to quantify them in case of interferences. Dialkylketones are separated from the extracted fat by alkaline saponification of the triglycerides. Dialkylketones migration from paper-based food contact articles into organic solvents isooctane and dichloromethane, in olive and sunflower oils, and in fatty foods (croissants, Gouda, cheddar cheese, and salami was studied). As a result, it was found that the simulating tests, including the edible oil extraction tests, gave migration values that exceeded the SML largely, while the migration with the food samples were largely below the SML. View Full-Text
Keywords: dialkylketones; alkylketene dimers (AKD); paperboard; food contact material; migration; fatty food; olive oil; cheese; NIAS; GC-FID dialkylketones; alkylketene dimers (AKD); paperboard; food contact material; migration; fatty food; olive oil; cheese; NIAS; GC-FID
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MDPI and ACS Style

Lestido-Cardama, A.; Störmer, Á.; Franz, R. Dialkylketones in Paperboard Food Contact Materials—Method of Analysis in Fatty Foods and Comparative Migration into Liquid Simulants Versus Foodstuffs. Molecules 2020, 25, 915.

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