title: Analysis of saturated and aromatic hydrocarbons migrating from a polyolefin-based hot-melt adhesive into food.
abstract: Hot-melt adhesives are widely utilised to glue cardboard boxes used as food packaging material. They have to comply with the requirements of Article 3 of the European Framework Regulation for food contact materials (1935/2004). The hot melt raw materials analysed mainly consisted of paraffinic waxes, hydrocarbon resins and polyolefins. The hydrocarbon resins, functioning as tackifiers, were the predominant source of hydrocarbons of sufficient volatility to migrate into dry foods: the 18 hydrocarbon resins analysed contained 8.2-118 g kg(-1) saturated and up to 59 g kg(-1) aromatic hydrocarbons eluted from GC between n-C16 and n-C24, substantially more than the paraffinic waxes and the polyolefins. These tackfier resins, especially the oligomers ≤ C24, have been characterised structurally by GC×GC-MS and (1)H-NMR spectroscopy. Migration into food was estimated using a simulating system with polenta as food simulant, which was verified by the analysis of a commercial risotto rice sample packed in a virgin fibre folding box sealed with a hot melt. About 0.5-1.5% of the potentially migrating substances (between n-C16 and n-C24) of a hot melt were found to be transferred into food under storage conditions, which can result in a food contamination in the order of 1 mg kg(-1) food (depending on the amount of potentially migrating substances from the hot melt, the hot melt surface, amount of food, contact time etc.). Migrates from hot melts are easily mistaken for mineral oil hydrocarbons from recycled cardboard.
authors.affiliation: a Chair of Food Science and Food Contact Materials , Technische Universität Dresden , Dresden , Germany.|b Official Food Control Authority of the Canton of Zurich , Zurich , Switzerland.
authors.forename: Martin
authors.initials: M
authors.lastname: Lommatzsch
authors.affiliation: b Official Food Control Authority of the Canton of Zurich , Zurich , Switzerland.
authors.forename: Maurus
authors.initials: M
authors.lastname: Biedermann
authors.affiliation: b Official Food Control Authority of the Canton of Zurich , Zurich , Switzerland.
authors.forename: Koni
authors.initials: K
authors.lastname: Grob
authors.affiliation: a Chair of Food Science and Food Contact Materials , Technische Universität Dresden , Dresden , Germany.
authors.forename: Thomas J
authors.initials: TJ
authors.lastname: Simat
mesh_terms: D000269:Adhesives / Q000737:chemistry*; D005506:Food Contamination / Q000032:analysis*; D018857:Food Packaging; D006358:Hot Temperature; D006838:Hydrocarbons / Q000032:analysis* / Q000737:chemistry*; D015394:Molecular Structure; D011090:Polyenes / Q000737:chemistry*
chemical_list: D000269:Adhesives; D006838:Hydrocarbons; D011090:Polyenes; C035051:PL 732
keywords: Petroleum hydrocarbon resins; comprehensive two-dimensional GC (GC×GC); food contact materials; mineral oil hydrocarbons; oligomers; online HPLC-GC-FID; polyolefin oligomeric hydrocarbons