以纸基食品接触材料中的4-肉桂苯酚（ CP）和水杨酸对叔丁基苯酯（ TBS）为模拟迁移物，对其向干性食品模拟物 Tenax TA中的迁移规律采用超高效液相色谱结合荧光检测（ UPLC-FLR）方法进行了研究。在不同温度下对CP和 TBS的迁移动力学进行了考察，并对其在封闭环境和敞开环境下的迁移率进行对比研究。通过设计不同质量的 Tenax TA接触直径为3.5 cm 圆片样品的迁移试验，探索了迁移试验中合适的模拟物质量／接触材料面积比条件。系列试验结果表明，迁移物迁移时间越长，迁移温度越高，相应的迁移率就越高；在高的迁移温度下，迁移物在 Tenax TA上的解吸会导致迁移率的下降；在封闭条件下 CP和 TBS的迁移率要高于敞开条件下的迁移率；迁移试验中，4.16 g／dm2的模拟物质量／接触材料面积比是利用干性食品模拟物进行食品接触材料暴露评估的合适的迁移试验条件。密闭条件下市售的8种食品接触材料干性食品模拟物迁移实验研究表明，TBS 存在于用于包装坚果类食品的包装纸中，含量为15.54 mg／kg。
Migration investigations were carried out on paper food packaging in contact with dry food simulant Tenax TA. The aim was to explore the migration behaviours of 4-cumylphenol ( CP)and 4-tert-butylphenyl salicylate( TBS)as potential contaminants,from paper materials to Tenax TA at different migration temperatures for variant migration times. A method based on ultrahigh performance liquid chromatography coupled with fluorescence detection( UPLC-FLR) was developed to determine CP and TBS migrated into the simulant. Two independent migration tests performed under open system and closed system were contrastively studied. At the same time,a series of migration tests by using different masses of Tenax TA to contact round paper samples with the diameter of 3. 5 cm was conducted to explore the proper ratio between the mass of Tenax TA and the area of food packaging sample. Based on the analytical results,high temperature and long contact time had positive effect on the migration rate of the contaminants. However,persistent high migration temperature would lead to decrease the migration rate due to desorption of CP and TBS from Tenax TA. Migration rate in closed system was higher than that in open system. In the process of migration test,a ratio of 4. 16 g/dm2 was an appropriate experimental condition to conduct the migration test. All of the migration results revealed that the proper ratio of mass of Tenax TA to area of paper sample was the key to conduct the expo-sure assessment of food contact materials.
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