Migration Modeling Of Harmful Substances From Packages To Food Simulants

Food packaging materials have an important role in the food safety. Althoughfood packaging materials can protect food from deteriorating, the migration ofchemicals in food packaging leads to negative impact on the quality and safety offood. So it’s necessary to study the migration of the chemicals in food packagingmaterials. The paper studied the migration of phthalates, caprolactam and UVabsorbers from PVC or PVA to food simulants in different environment （water bathheating or microwave heating） and established the mathematical model. The mainconclusions were as follows:Migration modeling of phthalates from PVC to food simulants under waterbath heating: This study aims to investigate the migration of five common PAEs（diethyl phthalate, diisobutyl phthalate, dibutyl phthalate, butyl benzyl phthalate, anddi（2-ethylhexyl）phthalate） from polyvinyl chloride into fatty food simulants （n-hexane,isooctane, and95%ethanol）. The migration levels of five PAEs into different foodsimulants were compared after reaching equilibrium with the plastic additive. Themigration rate was higher when the molar mass was lower, whereas K_o/w and themigration temperature were higher. Key parameters （diffusion and partitioncoefficients） of the migration processes were calculated and compared at differenttemperatures using a mathematical model based on Fick’s second law. The diffusioncoefficients ranged from1.08×10^-11cm²/s to5.50×10^-10cm²/s at60°C,2.46×10^-13cm²/s to3.61×10^-11cm²/s at40°C, and8.30×10^-14cm²/s to3.60×10^-12cm²/s at20°C.The diffusion coefficients well fit the Arrhenius relationship in the range of20°C to60°C.Migration modeling of UV absorbers from PVC to food simulants underwater bath heating: This study aims to investigate the migration of UV absorbers（UV-P, UV-327, UV-9, UV-531） from polyvinyl chloride into food simulants（distilled water,10%ethanol,95%ethanol）. The migration happened only in95%ethanol while no migration in distilled water and10%ethanol.Migration modeling of caprolactam from PVA to food simulants underwater bath heating: This study aims to investigate the migration of caprolactam frompolyvinyl alcohol into fatty food simulants （n-hexane, isooctane, and95%ethanol）.The migration from PVA to n-hexane and isooctane were nearly zero. The diffusioncoefficients well fit the Arrhenius relationship in the range of20°C to60°C and D₀ was2.24×10¹³cm²/s, E_A was142.97kJ.Migration of UV absorbers from PVC to food simulants under microwaveheating: This study aims to investigate the migration of four UV absorbers frompolyvinyl chloride into fatty food simulants （olive oil） under microwave heating. Themigration levels of UV absorbers into olive oil under microwave heating wereextremely higher than the migration levels under water bath heating. So the PVC wasbanned from using under microwave heating.Migration of caprolactam from PVA to food simulants under microwaveheating: This study aims to investigate the migration of caprolactam from polyvinylalcohol into fatty food simulants （olive oil, corn oil and peanut oil） under microwaveheating. The migration levels of caprolactam into olive oil were lower compared tothe migration levels into corn oil and peanut oil. So it’s safer to use olive oil and nopermission to microwave heating for a long time.