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Abstract: A novel magnetic molecularly imprinted sensor (Fe3O4/GO/Ag-MIPs) was successfully synthesized. Combining with the technique of surface-enhanced Raman scattering (SERS), it could be applied to detect cyfluthrin (LC). Herein, GO and Ag particles were anchored on the surface of the Fe3O4@SiO2 to obtain the composite (Fe3O4/GO/Ag), which was prepared as a SERS substrate. Then, the Fe3O4/GO/Ag-MIPs (FGA-MIPs) prepared by precipitation polymerization was evaluated as the SERS imprinted sensor for selective detection of LC from aqueous medium. The morphology and structural properties of FGA-MIPs were characterized by a series of modern analysis measurements. The results proved that FGA-MIPs possessed wonderful magnetic separation, sensitive SERS detection, and selectivity. Under optimal conditions, it exhibited a good linear relationship (R2 = 0.9926) between the Raman shift (at 1,004 cm-1) and the concentration of LC among 10-3 - 10-8 mol/L, and the limit of detection was 10-8 mol/L. Meanwhile, the selective experiment indicated that this material owned specific selectivity to the template molecules. Thus, the result of this experiment demonstrated that the FGA-MIPs was a highly sensitive and selective sensor material in the field of LC detection, and it provided a new approach to other residual pyrethroid detection in the environment water
Template and target information: cyfluthrin
Author keywords: Cyfluthrin, magnetic separation, selective detection, Surface-enhanced Raman scattering