Then,the prepared PET flakes were immerged into four kinds of food simulants(including n-hexane,15% ethyl alcohol,3% acetic acid and water).

• 而后,分别用4种食品模拟液(正己烷、15%25乙醇、3%25醋酸和蒸馏水)浸泡制备好的PET薄片。