engleski

Assesment of overall migrations from multilayer aluminum/polymer laminate to acid foods

Food comes into contact with a variety of materials during the production process, packaging, storage and in its final preparation as a meal in the consumer’s kitchen. Significant numbers of packaging materials are usually combination of two or more materials, like laminates. Multilayer laminate for food packaging very often presumes coated surface of one material by another (1). Polymers are well known material used for coatings of other packaging materials like metals to prevent corrosion and extraction of byproducts in food. The aim of this work was to determinate overall migrations from a multilayer aluminum/polymer laminate films that was in contact with 3% acetic acid simulating conditions of contact with acid food. Migration tests were carried out for 10 days at temperature of 40 ± 2°C according to HRN EN 1186-5:2004 standard. In order to gather more information about polymeric thermal varnish and possible migrants from aluminum/polymer packaging obtained dry residue was pyrolized at 650°C by Frontier double shot pyrolyzer interfaced with Shimadzu gas chromatography/mass spectrometry (Py-GC/MS) 2010 Plus. Prior to pyrolysis evolved gas analysis-gas chromatography/mass spectrometry (EGA-GC/MS) was preformed and obtained results were compared with pyrolysis products. Thermogram of evolved gas analysis from dry residue showed good correlation with obtained pyrolysis results. In addition to products, byproducts such as ketones were detected in significant proportions from adhesives and upper layers of laminate by pyrolysis. The results have shown a significant impact of acid media on the concentration of the obtained overall migrations due to increased overall migration values.

aluminum/polymer laminate ; overall migration ; acid food ; evolved gas analysis- gas chromatography/mass spectrometry ; pyrolysis - gas chromatography/mass spectrometry

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