纸质包装材料中有机污染物向固体食品模拟物的迁移行为分析

摘要

利用气相色谱-质谱（GC －MS）联用技术对苯酚、十二烷基苯、2，6－二异丙基萘（2，6-DiPNs）、邻苯二甲酸二丁酯（DBP）以及邻苯二甲酸二（2-乙基己基）酯（DEHP）等5种模拟污染物分别在不同温度、不同接触时间的情况下，从牛皮包装纸向固体食品模拟物的迁移行为进行了研究。结果表明在温度相同的情况下，各模拟污染物的迁移率随着接触时间的增长而增大，最终都有达到平衡的趋势。并且模拟污染物的分子量越小，其达到迁移平衡所需要的时间越短，分子量越大，其从纸张中向固体食品模拟物的迁移率越低。另外，非极性模拟污染物的迁移率较极性的高。对相同模拟污染物而言，温度越高，其达到迁移平衡所需要的时间越短，即迁移速度越快。%Gas Chromatography-Mass Spectra was used to research the migration behavior of five surro-gates,phenol,alkylbenzene,2,6-Dissopropyl naphthalenes(2,6-DiPNs),dibutyl phthalate (DBP)and Bis (2-ethylhexyl)phthalate (DEHP),from paper to the solid foodat different temperatures and time.The migra-tion of all surrogates increased with the contact time,and eventually tended to balance,when paper samples and temperatures are the same.The smaller molecular weight of the surrogate,the shorter time to balance, and the bigger molecular weight of the surrogate,the lower migration of it.In addition,the migration of surro-gates are affected by the polarity of them,that is the nonpolar one′s migration is higher than the polar one′s. And for the same surrogate,the higher of the temperature,the shorter time to achieve balance,in other words,migration rate is faster.