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Preparation and application of a magnetic plasticizer as a molecularly imprinted polymer adsorbing material for the determination of phthalic acid esters in aqueous samples
Author(s) -
Wei ShouLian,
Liu WanTing,
Huang XiaoChen,
Ma JinKui
Publication year - 2018
Publication title -
journal of separation science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.72
H-Index - 102
eISSN - 1615-9314
pISSN - 1615-9306
DOI - 10.1002/jssc.201800535
Subject(s) - molecularly imprinted polymer , phthalic acid , chemistry , dibutyl phthalate , methacrylic acid , polymerization , precipitation polymerization , thermogravimetric analysis , ethylene glycol dimethacrylate , aqueous solution , plasticizer , phthalate , detection limit , chromatography , adsorption , polymer , nuclear chemistry , radical polymerization , selectivity , organic chemistry , catalysis
A novel magnetic plasticizer molecularly imprinted polymer adsorbing material (MIP@mSiO 2 ‐β‐CD@Fe 3 O 4 ) 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 (mSiO 2 ‐β‐CD@Fe 3 O 4 ) 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@mSiO 2 ‐β‐CD@Fe 3 O 4 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.