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Abstract: A novel magnetic plasticizer molecularly imprinted polymer adsorbing material (MIP@mSiO2-β-CD@Fe3O4) was successfully synthesized for the determination of six phthalic acid esters in water, milk, and wine samples. The molecularly imprinted polymers were prepared via precipitation polymerization and a surface molecular imprinting technique, using a cyclodextrin-modified magnetic meso-porous material (mSiO2-β-CD@Fe3O4) as a magnetic supporter, dibutyl phthalate and butyl benzyl phthalate as the dual template molecules, methacrylic acid as the functional monomer, and ethyleneglycol dimethacrylate as the cross-linking agent. The polymers were characterized by scanning electron microscopy, IR spectroscopy, and X-ray powder diffraction. Thermogravimetric analysis and static and dynamic adsorption experiments were carried out to assay its stability and selectivity. Under optimal experimental conditions, a magnetic solid-phase extraction with MIP@mSiO2-β-CD@Fe3O4 coupled to gas chromatography and mass spectrometry method was successfully developed for the determination of phthalic acid esters. The established method achieved a good linear range of 0.10-8.00 μg/mL (R > 0.99) and a low detection limit within the range of 1.0-5.0 μg/L. An average recovery rate of 80.2-103% with relative standard deviation < 6.7% was obtained upon the application of the developed method to detect phthalic acid esters in actual aqueous samples
Template and target information: phthalate esters, butyl benzyl phthalate, BBP, dibutyl phthalate, DBP, dicyclohexyl phthalate, DCHP, diethylhexyl phthalate, DEHP, diethyl phthalate, DEP, dimethyl phthalate, DMP
Author keywords: aqueous samples, magnetic plasticizers, Molecularly imprinted polymers, phthalic acid esters, Trace detection