The fluorescent whitening agents (FWAs) could be used in polyethylene (PE) packaging to increase whiteness, little work is done to explore the pollution form PE additives to food. Therefore, this study investigated the migration of FWAs from PE food packaging to a fatty food simulant (corn oil) and aqueous ethanol food simulant. Using the determined migration data, both a Crank monolayer migration model based on Fick’s second law and a Weibull migration model were established for the FWAs. We compared the applicability of the two models to the migration tendencies of the FWAs. Both models could describe the migration behaviors of the FWAs into corn oil, the Weibull model predictions were closer to the actual migration trends. The migration behaviors of the FWAs into 95% ethanol could only be described by Crank model. In the Weibull model, the values of the parameters τ and β were positively correlated with temperature and negatively correlated with the thickness of the food packaging. In the Crank model, the partition coefficient values were positively correlated with the boiling points and negatively correlated with the polarity values. The storage conditions of the food including temperature, the thickness of PE had a tremendous impact on the migration of the FWAs in the PE. We hope this study can promote a deeper understanding of additive pollution from packaging materials to food.

中文翻译：

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荧光增白剂从聚乙烯食品包装向食品模拟物的迁移动力学

荧光增白剂（FWA）可以用于聚乙烯（PE）包装中以增加白度，而研究PE添加剂对食品的污染却很少。因此，本研究调查了FWA从PE食品包装向脂肪食品模拟物（玉米油）和水性乙醇食品模拟物的迁移。使用确定的迁移数据，为FWA建立了基于Fick第二定律的Crank单层迁移模型和Weibull迁移模型。我们将两种模型的适用性与FWA的迁移趋势进行了比较。两种模型都可以描述FWA向玉米油的迁移行为，Weibull模型的预测更接近实际的迁移趋势。FWA向95％乙醇的迁移行为只能用Crank模型来描述。在Weibull模型中 参数τ和β的值与温度呈正相关，与食品包装的厚度呈负相关。在Crank模型中，分配系数值与沸点正相关，而与极性值负相关。食物的储存条件包括温度，PE的厚度对FWA在PE中的迁移产生了极大的影响。我们希望这项研究可以增进对从包装材料到食品的添加剂污染的更深入的了解。食物的储存条件包括温度，PE的厚度对FWA在PE中的迁移产生了极大的影响。我们希望这项研究可以增进对从包装材料到食品的添加剂污染的更深入的了解。食物的储存条件包括温度，PE的厚度对FWA在PE中的迁移产生了极大的影响。我们希望这项研究可以增进对从包装材料到食品的添加剂污染的更深入的了解。