Abstract

The polymer additives may migrate out from polymer plastics into foods and drinks and their potential risk should not be ignored. In this study, amino group modified magnetic mesoporous silica microspheres were prepared by an in situ method. The magnetic microspheres as adsorbent of magnetic solid-phase extraction (MSPE) were coupled with high performance liquid chromatography (HPLC) to determine nine kinds of polymer additives including antioxidants and ultraviolet absorbers. An excellent linearity (0.9999 ≥ R² ≥ 0.9994) was at the range of 1.25–1000 ng/mL under optimized conditions. The limits of detection (LODs) and quantification were 0.01–0.09 ng/mL and 0.02–0.30 ng/mL, respectively, for the nine polymer additives, which was lower than those previously reported. This method can be used for the quantitative determination of the migration levels of seven kinds of polymer additives in real foods and drinks packed with plastics.

摘要

聚合物添加剂可能会从聚合物塑料迁移到食品和饮料中，其潜在风险不容忽视。在这项研究中，通过原位方法制备了氨基修饰的磁性介孔二氧化硅微球。将磁性微球作为磁性固相萃取（MSPE）的吸附剂，与高效液相色谱（HPLC）结合，确定了包括抗氧化剂和紫外线吸收剂在内的9种聚合物添加剂。优异的线性度（0.9999≥  - [R ²在最佳条件下，≥0.9994）的范围为1.25–1000 ng / mL。九种聚合物添加剂的检出限（LODs）和定量分别为0.01–0.09 ng / mL和0.02–0.30 ng / mL，这比以前报道的要低。该方法可用于定量测定塑料包装的真实食品和饮料中7种聚合物添加剂的迁移水平。