Beijing Advanced Innovation Center for Food Nutrition and Human Health, Beijing Technology and Business University (BTBU), PR China; School of Food & Biological Engineering, Jiangsu University, Zhenjiang 212013, PR China.
School of Food & Biological Engineering, Jiangsu University, Zhenjiang 212013, PR China.
Food Chem. 2020 Jul 1;317:126431. doi: 10.1016/j.foodchem.2020.126431. Epub 2020 Feb 19.
Novel dummy magnetic molecularly imprinted polymers (dex-MMIPs) were prepared for highly selective recognition and fast enrichment of acrylamide (AA) in potato chips. Propionamide (PA) was used as dummy template molecule and the FeO nanoparticles modified with carboxymethyl dextran were developed as supports. Methacrylic acid (MAA) and ethyleneglycoldimethacrylate (EGDMA) were chosen as the functional monomer and cross-linker, respectively. Fourier transform infrared (FTIR) spectroscopy, thermogravimetric analysis (TGA), and transmission electron microscopy (TEM) were used to characterize the synthesized dex-MMIPs. The adsorption of dex-MMIPs reached equilibrium within 20 min, and the maximum adsorption quantity (Q) was 19.28 mg/g with the dissociation constant (K) of 35.7 mg/L. Moreover excellent recognition toward acrylamide was achieved compared to analogs, such as N, N'-methylenebisacrylamide (MBA) and nicotinamide (VPP). The satisfactory recoveries of 83.9-96.8% were achieved for selective separation and enrichment of AA in spiked potato chips by dex-MMIPs.
新型虚拟磁性分子印迹聚合物（dex-MMIPs）被制备用于高度选择性识别和快速富集薯片 中的丙烯酰胺（AA）。丙酰胺（PA）被用作虚拟模板分子，FeO 纳米粒子修饰的羧甲基葡聚糖被开发为 载体。甲基丙烯酸（MAA）和乙二醇二甲基丙烯酸酯（EGDMA）分别被选为功能单体和交联剂。 傅里叶变换红外（FTIR）光谱、热重分析（TGA）和透射电子显微镜（TEM）用于表征合成 的 dex-MMIPs。dex-MMIPs 的吸附在 20 分钟内达到平衡，最大吸附量（Q）为 19.28mg/g，离解 常数（K）为 35.7mg/L。与类似物，如 N，N'-亚甲基双丙烯酰胺（MBA）和烟酰胺（VPP）相比， 对丙烯酰胺具有优异的识别能力。通过 dex-MMIPs 对添加到土豆片中的 AA 进行选择性分离和 富集，可获得 83.9-96.8%的满意回收率。
