食品包装纸中紫外吸收剂向固态模拟物的迁移行为研究

ontaminants migrate from packaging materials into food is a big issue in food safety and quality, as it may pose a threat for consumers. The research of migration characters and the mathematic model to predict the migration amount are necessary. The migration of four kinds of ultraviolet absorbers (UV-327, UV-P, UV-9 and UV-531) from kraft paper to solid food simulants was investigated at 50, 75 and 100℃ in this paper. Effects of temperature as well as physicochemical properties of the ultraviolet absorbers on migration were discussed. Temperature played a key role in the migration process. The migration rate and final migration amount increased with temperature. Smaller molecular weight, lower values of log Po/w and boiling points of migrants had a positive impact on the migration. The mathematic model based on Fick's second law was built and applied to predict the migration amount of UV-P from paper into solid simulants at 70℃. The results showed the built mathematic model could predict the migration amount very well in the initial period before equilibrium.