为了解PVC垫片接触各类食品的安全性，采用气相色谱质谱联用法研究了PVC垫片中DEHP在乙醇和正己烷中的迁移行为及其影响因素。实验结果表明：随着时间的延长，DEHP的迁出量逐渐增加；PVC垫片厚度越小，DEHP越容易迁出；与乙醇相比，DEHP更容易向正己烷中迁移，PVC垫片应避免接触脂肪类食品。

The migration of DEHP in PVC gasket dipped in ethanol and n-hexane and its infiuencing factors were studied to find out the security of polyvinyl chloride (PVC) gasket. The tests showed that the migration quantity increased with the dipped time increase; the migration was easier when the PVC gasket was thinner; the migration of DEHP from PVC gasket to n-hexane was easier than to ethanol. It was suggested that PVC gasket should avoid contacting fatty food.