Résumé
Migration was assessed during and after two HP/T treatments intended to perform a pasteurization (800 MPa for 5 min, from 20 to 40 °C) and a sterilization treatment (800 MPa for 5 min, from 90 to 115 °C) and were compared to conventional pasteurization and sterilization respectively. The specific migration of actual packaging additives used as antioxidants and UV absorbers (Irganox 1076, Uvitex OB) was investigated in a number of food-packaging system combining one synthetic common packaging (LLDPE) and a bio-sourced one (PLA) in contact with the four food simulating liquids defined by EC regulations. After standard HP/T processing, migration kinetics was followed during service life of package material using FTIR spectroscopy. LLDPE withstood the HP sterilization whereas it melted during the conventional sterilization. No difference was observed on migration from LLDPE for both treatments. In the case of PLA, migration of Uvitex OB was very low or no detectable for all the studied cases.