title: Synthesis of molecularly imprinted polymers by atom transfer radical polymerization for the solid-phase extraction of phthalate esters in edible oil.
abstract: Novel molecularly imprinted polymers of phthalate esters were prepared by atom transfer radical polymerization using methyl methacrylate as functional monomer, cyclohexanone as solvent, cuprous chloride as catalyst, 1-chlorine-1-ethyl benzene as initiator and 2,2-bipyridyl as cross-linker in the mixture of methanol and water (1:1, v/v). The effect of reaction conditions such as monomer ratio and template on the adsorption properties was investigated. The optimum condition was obtained by an orthogonal experiment. The obtained polymers were characterized using scanning electron microscopy. The binding property was studied with both static and dynamic methods. Results showed that the polymers exhibited excellent recognition capacity and outstanding selectivity for ten phthalate esters. Factors affecting the extraction efficiency of the molecularly imprinted solid-phase extraction were systematically investigated. An analytical method based on the molecularly imprinted coupled with gas chromatography and flame ionization detection was successfully developed for the simultaneous determination of ten phthalate esters from edible oil. The method detection limits were 0.10-0.25 μg/mL, and the recoveries of spiked samples were 82.5-101.4% with relative standard deviations of 1.24-5.37% (n = 6).
authors.affiliation: School of Chemistry and Chemical Engineering, Henan University of Technology, Zhengzhou, P.R. China.
authors.forename: Ningning
authors.initials: N
authors.lastname: Chen
authors.affiliation: School of Chemistry and Chemical Engineering, Henan University of Technology, Zhengzhou, P.R. China.
authors.forename: Juan
authors.initials: J
authors.lastname: He
authors.affiliation: School of Chemistry and Chemical Engineering, Henan University of Technology, Zhengzhou, P.R. China.
authors.forename: Chaojun
authors.initials: C
authors.lastname: Wu
authors.affiliation: School of Chemistry and Chemical Engineering, Henan University of Technology, Zhengzhou, P.R. China.
authors.forename: Yuanyuan
authors.initials: Y
authors.lastname: Li
authors.affiliation: School of Chemistry and Chemical Engineering, Henan University of Technology, Zhengzhou, P.R. China.
authors.forename: An
authors.initials: A
authors.lastname: Suo
authors.affiliation: School of Chemistry and Chemical Engineering, Henan University of Technology, Zhengzhou, P.R. China.
authors.forename: Hongliang
authors.initials: H
authors.lastname: Wei
authors.affiliation: School of Chemistry and Chemical Engineering, Henan University of Technology, Zhengzhou, P.R. China.
authors.forename: Lijun
authors.initials: L
authors.lastname: He
authors.affiliation: College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou, P.R. China.
authors.forename: Shusheng
authors.initials: S
authors.lastname: Zhang
mesh_terms: D000327:Adsorption; D004952:Esters / Q000032:analysis*; D054802:Molecular Imprinting; D010795:Phthalic Acids / Q000032:analysis*; D010938:Plant Oils / Q000032:analysis*; D058105:Polymerization; D011108:Polymers; D052616:Solid Phase Extraction
chemical_list: D004952:Esters; D010795:Phthalic Acids; D010938:Plant Oils; D011108:Polymers; C032279:phthalic acid
keywords: atom transfer radical polymerization; edible oils; molecularly imprinted polymers; phthalate esters