Determination of diffusion and partition coefficients of model migrants by direct contact and vapour phase transfer from low-density polyethylene films into cake

作者：Paseiro-Cerrato Rafael^*; Rodriguez-Bernaldo de Quiros Ana; Otero-Pazos Pablo; Sendon Raquel; Paseiro-Losada Perfecto

来源：Food Additives and Contaminants Part A-Chemistry Analysis Control Exposure& Risk Assessment, 2018, 35(3): 555-562.

DOI：10.1080/19440049.2017.1397294

• Food packaging
• migration
• vapour phase
• diffusion coefficients
• partition coefficients
• photoinitiators
• additives
• modelling
• cake
• fatty food

The aim of the present study was to determine the migration kinetics of one photoinitiator, benzophenone, and two optical brighteners, Uvitex OB and 1,4-diphenyl-1,3-butadiene (DPBD), from low-density polyethylene (LDPE) films into cake. Transfer was assessed by both direct contact and also the vapour phase.To perform the migration tests by direct contact, plastic films enriched with the additives were placed between two cake slices. To evaluate the migration through the gas phase, cake and the fortified LDPE film were placed with no direct contact in a glass container that was hermetically closed. Samples were stored at different time-temperature conditions.Target compounds were extracted from the films with ethanol (70 degrees C, 24h) and analysed by HPLC-DAD. Relevant parameters such as partition and diffusion coefficients between food and plastic film were calculated. The Arrhenius equation was applied to estimate the diffusion coefficient at any temperature.The data indicate that migration of benzophenone occurs in a significant extent into cake by both direct contact and through the gas phase (no direct contact). Conversely, very little migration occurred for Uvitex OB by direct contact and none through the gas phase. Results for benzophenone suggest that migration through the gas phase should be considered when evaluating migration from food packaging materials into food.

• 出版日期2018