食品包装PE材料中荧光增白剂迁移规律的分析

以PE塑料薄膜为研究对象，采用高效液相色谱法研究食品包装塑料材料中荧光增白剂在纯水、乙酸、乙醇、植物油4?种不同模拟物中的迁移规律，研究荧光增白剂溶出量与食品接触介质、乙酸质量浓度、乙醇体积分数、浸泡温度以及处理时间等因素的关系。结果表明：纯水基质食品模拟物对香豆素类荧光增白剂有一定溶解性，酸性食品模拟物相比于水模拟物有更强的溶解性，而含醇类食品模拟物和脂肪类食品模拟物对大部分荧光增白剂都具有较好的溶解效果；荧光增白剂的溶出量随着乙酸和乙醇含量的增加而增加；较高的温度对塑料包装材料中荧光增白剂的迁移溶出具有显著影响，并且随着接触时间的延长，塑料包装材料中的荧光增白剂向食品中迁移的可能性也不断增大。

Migration of Fluorescent Whitening Agents from Polyethylene Food Packaging Materials

The migration of fluorescent whitening agents from polyethylene (PE) food packaging films into water, acetic acid, ethanol, and vegetable oil was investigated using high performance liquid chromatography (HPLC). The dissolution of fluorescent whitening agents was studied as a function of food contact medium, acetic acid concentration, ethanol concentration, soaking temperature and time. The results showed that coumarin-containing fluorescent whitening agent could be dissolved by the aqueous food simulant, and the effect was weaker than that of the acidic food stimulant. The alcoholic and fatty food simulants could better dissolve most fluorescent whitening agents in a concentration-dependent manner. The migration of fluorescent whitening agents in plastic packaging materials was significantly promoted at higher temperature. Moreover, the possibility of migration of fluorescent whitening agents from plastic packaging materials into the foods increased with contact time.