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。