title: Detection of λ-cyhalothrin by a core-shell spherical SiO2-based surface thin fluorescent molecularly imprinted polymer film.
abstract: A fluorescent core-shell molecularly imprinted polymer based on the surface of SiO2 beads was synthesized and its application in the fluorescence detection of ultra-trace λ-cyhalothrin (LC) was investigated. The shell was prepared by copolymerization of acrylamide with allyl fluorescein in the presence of LC to form recognition sites. The experimental results showed that the thin fluorescent molecularly imprinted polymer (FMIP) film exhibited better selective recognition ability than fluorescent molecularly non-imprinted polymer (FNIP). A new nonlinear relationship between quenching rate and concentration was found in this work. In addition, the nonlinear relationship allowed a lower concentration range of 0-5.0 nM to be described by the Stern-Volmer equation with a correlation coefficient of 0.9929. The experiment results revealed that the SiO2@FMIP was satisfactory as a recognition element for determination of LC in soda water samples. Therefore this study demonstrated the potential of MIP for the recognition and detection of LC in food.
authors.affiliation: Key Laboratory of Preparation and Applications of Environmental Friendly Materials, Chinese Ministry of Education, Jilin Normal University, Siping, 136000, China.|School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang, 212013, China.
authors.forename: Lin
authors.initials: L
authors.lastname: Gao
authors.affiliation: Key Laboratory of Preparation and Applications of Environmental Friendly Materials, Chinese Ministry of Education, Jilin Normal University, Siping, 136000, China.
authors.forename: Wenjuan
authors.initials: W
authors.lastname: Han
authors.affiliation: Key Laboratory of Preparation and Applications of Environmental Friendly Materials, Chinese Ministry of Education, Jilin Normal University, Siping, 136000, China.
authors.forename: Xiuying
authors.initials: X
authors.lastname: Li
authors.affiliation: School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang, 212013, China.
authors.forename: Jixiang
authors.initials: J
authors.lastname: Wang
authors.affiliation: Key Laboratory of Preparation and Applications of Environmental Friendly Materials, Chinese Ministry of Education, Jilin Normal University, Siping, 136000, China. yyspaper@163.com.
authors.forename: Yongsheng
authors.initials: Y
authors.lastname: Yan
authors.affiliation: School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang, 212013, China.
authors.forename: Chunxiang
authors.initials: C
authors.lastname: Li
authors.affiliation: School of Material Science and Engineering, Jiangsu University, Zhenjiang, 212013, China.
authors.forename: Jiangdong
authors.initials: J
authors.lastname: Dai
mesh_terms: D005453:Fluorescence; D057230:Limit of Detection; D054802:Molecular Imprinting; D009570:Nitriles / Q000737:chemistry*; D010575:Pesticides / Q000737:chemistry*; D011108:Polymers / Q000138:chemical synthesis / Q000737:chemistry*; D011722:Pyrethrins / Q000737:chemistry*; D012822:Silicon Dioxide / Q000737:chemistry*; D052616:Solid Phase Extraction / Q000295:instrumentation / Q000379:methods*; D017550:Spectroscopy, Fourier Transform Infrared
chemical_list: D009570:Nitriles; D010575:Pesticides; D011108:Polymers; D011722:Pyrethrins; D012822:Silicon Dioxide; C037304:cyhalothrin
keywords: Fluorescence detection; Nonlinear equation; Surface molecularly imprinted polymer; Ultra-trace; λ-Cyhalothrin