title: Dummy molecularly imprinted magnetic nanoparticles for dispersive solid-phase extraction and determination of bisphenol A in water samples and orange juice.
abstract: A novel dummy molecularly imprinted magnetic nanoparticle (MI-MNP) was prepared by a hybrid imprinting technique for dispersive solid-phase extraction (d-SPE) and determination of bisphenol A (BPA). 2,2'-Bis(4-hydroxyphenyl)-hexafluoropropane was used as the template molecule and Fe3O4nanoparticle as the magnetic core. The MI-MNPs were characterized by FT-IR spectroscopy, thermo- gravimetric analysis, X-ray diffraction, transmission electron microscopy, and vibrating sample magnetometer. The adsorption tests showed that the MI-MNPs had a high binding ability for BPA and presented a fast binding kinetics. When used as a d-SPE sorbent, the MI-MNP showed high extraction efficiency, high enrichment factor and good reusability for BPA, and it can be easily recycled by a magnet. Furthermore, the dummy imprinting strategy can completely avoid the interference of the residual template in sorbent to determination of BPA. Using the MI-MNPs as sorbent, a d-SPE-HPLC-UV method was developed and successfully applied to the analysis of BPA spiked in water samples and orange juice and that in a certified sample with recoveries of 95.0-106.2% (RSD=2.5-4.5%), 93.3-100.0% (RSD=1.2-5.0%) and 100.3% (RSD=3.5%), respectively. The limit of detection (S/N=3) for all samples was 0.3ngmL-1. The new MI-MNPs can be utilized as a good d-SPE sorbent for BPA in environmental water samples and beverages.
authors.affiliation: School of Chemistry and Chemical Engineering, Wuhan Textile University, 1 Textile Road, Wuhan 430073, China.
authors.forename: Xiao
authors.initials: X
authors.lastname: Wu
authors.affiliation: School of Chemistry and Chemical Engineering, Wuhan Textile University, 1 Textile Road, Wuhan 430073, China.
authors.forename: Yarong
authors.initials: Y
authors.lastname: Li
authors.affiliation: School of Chemistry and Chemical Engineering, Wuhan Textile University, 1 Textile Road, Wuhan 430073, China.
authors.forename: Xiaoliang
authors.initials: X
authors.lastname: Zhu
authors.affiliation: School of Chemistry and Chemical Engineering, Wuhan Textile University, 1 Textile Road, Wuhan 430073, China. Electronic address: chiyanghe@wtu.edu.cn.
authors.forename: Chiyang
authors.initials: C
authors.lastname: He
authors.affiliation: School of Chemistry and Chemical Engineering, Wuhan Textile University, 1 Textile Road, Wuhan 430073, China. Electronic address: wangqche@hotmail.com.
authors.forename: Qiang
authors.initials: Q
authors.lastname: Wang
authors.affiliation: Department of Chemistry and Biochemistry, University of Oklahoma, 101 Stephenson Parkway, Norman, OK 73019, United States.
authors.forename: Shaorong
authors.initials: S
authors.lastname: Liu
mesh_terms: D001559:Benzhydryl Compounds / Q000032:analysis*; D032084:Citrus sinensis / Q000737:chemistry*; D000067030:Fruit and Vegetable Juices / Q000032:analysis*; D008280:Magnetics; D058185:Magnetite Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure; D046529:Microscopy, Electron, Transmission; D054802:Molecular Imprinting; D010636:Phenols / Q000032:analysis*; D015203:Reproducibility of Results; D052616:Solid Phase Extraction / Q000379:methods*; D017550:Spectroscopy, Fourier Transform Infrared; D014874:Water Pollutants, Chemical / Q000032:analysis*; D014961:X-Ray Diffraction; D000098826:Bisphenol A Compounds
chemical_list: D001559:Benzhydryl Compounds; D058185:Magnetite Nanoparticles; D010636:Phenols; D014874:Water Pollutants, Chemical; C006780:bisphenol A; D000098826:Bisphenol A Compounds
keywords: Bisphenol A; Dispersive solid-phase extraction; Dummy molecular imprinting; HPLC-UV; Magnetic nanoparticle