State Key Laboratory of Food Nutrition and Safety, Tianjin University of Science and Technology, Tianjin 300457, China; Tianjin Key Laboratory of Food Quality and Health, Tianjin University of Science and Technology, Tianjin 300457, China.
State Key Laboratory of Food Nutrition and Safety, Tianjin University of Science and Technology, Tianjin 300457, China; Tianjin Key Laboratory of Food Quality and Health, Tianjin University of Science and Technology, Tianjin 300457, China.
Food Chem. 2023 Nov 15;426:136621. doi: 10.1016/j.foodchem.2023.136621. Epub 2023 Jun 19.
A rapid and selective sorbent for the enrichment of dibutyl phthalate (DBP) from water and Chinese Baijiu samples was established using magnetic surface molecularly imprinted polymers (MSMIPs) combined with gas chromatography-mass spectrometer (GC-MS). The MSMIPs were synthesized using a magnetic nanosphere material with silica layer, increasing the polymer surface area as a carrier. Compared with the traditional methods, the addition of magnetic microspheres simplified the process of food substrate purification and significantly shortened the pre-concentration time. The MSMIPs adsorption conforms to the Freundlich isotherm model as multilayer adsorption on an inhomogeneous surface and the pseudo-second-order model. The developed MSMIPs combined with GC-MS method showed good linearity in DBP concentration range of 0.02-1.0 mg L with low LOD (0.0054 mg L) and LOQ (0.018 mg L), and obtained good recoveries in real samples (95.2-97.2%) with RSD < 5.0% (n = 9), which were consistent with those from Chinese national standard method.
采用磁固相表面分子印迹聚合物（MSMIP）结合气相色谱-质谱联用仪（GC-MS），建立了一种从水样和中国白酒样品中快速选择性富集邻苯二甲酸二丁酯（DBP）的方法。MSMIP 是在具有二氧化硅层的磁性纳米球材料上合成的，增加了聚合物的表面积作为载体。与传统方法相比，磁性微球的加入简化了食品基体的净化过程，显著缩短了预浓缩时间。MSMIPs 的吸附符合 Freundlich 等温模型，即不均匀表面上的多层吸附和准二级吸附模型。所开发的 MSMIP 结合 GC-MS 方法在 DBP 浓度范围为 0.02-1.0 mg/L 时表现出良好的线性，LOD（0.0054 mg/L）和 LOQ（0.018 mg/L）较低，实际样品中的回收率良好（95.2%-97.2%），RSD<5.0%（n=9），与中国国家标准方法一致。
