A precise and efficient detection of Beta-Cyfluthrin via fluorescent molecularly imprinted polymers with ally fluorescein as functional monomer in agricultural products. (15th February 2017)

• Record Type: Journal Article
• Authors: Qiu, Hao; Gao, Lin; Wang, Jixiang; Pan, Jianming; Yan, Yongsheng; Zhang, Xifeng
• Is Part Of: Food chemistry. Volume 217(2017)
• Page Start: 620
• Page End: 627
• Publication Date: 2017-02-15
• Subjects: Fluorescent molecularly imprinted polymers -- Beta-Cyfluthrin -- Fluorescence detection; Food -- Analysis -- Periodicals; Food -- Composition -- Periodicals; 664
• DOI: 10.1016/j.foodchem.2016.09.028
• Languages: English
• ISSNs: 0308-8146

Abstract

Highlights: Highly-controllable core–shell SiO2 -MPTMS@FMIPs were prepared. SiO2 -MPTMS@FMIPs integrated the advantages of molecular imprinting and fluorescence detection technology. Ally fluorescein was chosen as the functional monomer rather than traditional functional monomer. SiO2 -MPTMS@FMIPs was used as fluorescent sensor for detection of Beta-Cyfluthrin (BC). Core-shell SiO2 -MPTMS@FMIPs had low LOD and it was 10.11 nM. Abstract: In this study, an effective and precise fluorescent molecularly imprinted polymers (FMIPs) for the determination of Beta-Cyfluthrin (BC) was synthesized via precipitation polymerization with SiO2 as the carrier, BC as the target molecule, ally fluorescein as the functional monomer, trimethylolpropane trimethacrylate (TRIM) as the crosslinker. Moreover, the characteristic of material has been measured by FTIR, TEM, SEM, TGA, LSCM and fluorescence spectrophotometer. Average diameter and shell thickness of as-synthesized microspheres were 300 nm and 50 nm, respectively. An excellent linear relationship of SiO2 -MPTMS@FMIPs with a correlation coefficient of 0.9919 could be gained covering a wide concentration range of 10.11–80 nM described by the Stern-Volmer equation. The limit of detection (LOD) was evaluated with the equation LOD = 3σ/S and was found to be 10.11 nM. The study demonstrated that SiO2 -MPTMS@FMIPs could improve the determination for BC and illustrated the good prospects of SiO2 -MPTMS@FMIPs for BC detection in agricultural products.