Journal
FOOD CHEMISTRY
Volume 317, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.foodchem.2020.126431
Keywords
Dummy magnetic molecularly imprinted; polymers; Acrylamide; Propionamide; Fe3O4 nanoparticles; Dextran
Funding
- National Key Research and Development Program of China [2018YFC1604401]
- Beijing Advanced Innovation Center for Food Nutrition and Human Health
- Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)
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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 Fe3O4 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 dexMMIPs. The adsorption of dex-MMIPs reached equilibrium within 20 min, and the maximum adsorption quantity (Q(m)) was 19.28 mg/g with the dissociation constant (K-d) 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.
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