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Reference type: Journal
Authors: Gao L, Wang JX, Li XY, Yan YS, Li CX, Pan JM
Article Title: A core-shell surface magnetic molecularly imprinted polymers with fluorescence for λ-cyhalothrin selective recognition.
Publication date: 2014
Journal: Analytical and Bioanalytical Chemistry
Volume: 406
Issue: (28)
Page numbers: 7213-7220.
DOI: 10.1007/s00216-014-8126-8

Abstract: In this study, we report here a general protocol for making core-shell magnetic Fe3O4/SiO2-MPS/MIPs (MPS = 3-(methacryloxyl) propyl trimethoxysilane, MIPs = molecularly imprinted polymers, Fe3O4/SiO2-MPS as core, MIPs as shell) via a surface molecular imprinting technique for optical detection of trace λ-cyhalothrin. The fluorescent molecularly imprinted polymer shell was first prepared by copolymerization of acrylamide with a small quantity of allyl fluorescein in the presence of λ-cyhalothrin to form recognition sites without doping. The magnetic Fe3O4/SiO2-MPS/MIPs exhibited paramagnetism, high fluorescence intensity, and highly selective recognition. Using fluorescence quenching as a detecting tool, Fe3O4/SiO2-MPS/MIPs were successfully applied to selectively and sensitively detect λ-cyhalothrin, and a linear relationship could be obtained covering a wide concentration range of 0-50 nM with a correlation coefficient of 0.9962 described by the Stern-Volmer equation. The experimental results of practical detection revealed that magnetic Fe3O4/SiO2-MPS/MIPs as an attractive recognition element was satisfactory for determination of trace λ-cyhalothrin in honey samples. This study, therefore, demonstrated the potential of MIPs for detection of λ-cyhalothrin in food
Template and target information: λ-cyhalothrin
Author keywords: polymers, optical sensors, Fluorescence, luminescence

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