title: Molecularly imprinted ionic liquid magnetic microspheres for the rapid isolation of organochlorine pesticides in environmental water.
abstract: A new type of molecularly imprinted ionic liquid magnetic microspheres was synthesized by aqueous suspension polymerization, using 4,4'-dichlorobenzhydrol as a dummy template, and 1-allyl-3-ethylimidazolium hexafluorophosphate and methacrylic acid as co-functional monomers. The results of morphology and magnetic property evaluation of the obtained microspheres demonstrated that it was monodispersed spherical, possessed a rough surface, and an outstanding magnetic properties. Binding experiments revealed that it had a substantial adsorption capacity and strong recognition ability to organochlorine pesticides (OCPs) in aqueous solution. Then the microspheres were applied as an adsorbent of magnetic dispersive solid-phase extraction for the selective recognition and rapid determination of OCPs in environmental water. Under the optimum conditions, good linearity of the three types of OCPs (dicofol, tetradifon, and p,p'-dichlorodiphenyldichloroethane) was achieved in the range of 1.0-100 ng/mL (r ≥ 0.9994). The recoveries at three spiking levels ranged from 82.6 to 100.4% with the RSDs less than 6.9%.
authors.affiliation: Department of Biochemistry, Baoding University, Baoding, China.
authors.forename: Fengxia
authors.initials: F
authors.lastname: Qiao
authors.affiliation: Key Laboratory of Medicinal Chemistry and Molecular Diagnosis, Department of Preventive Medicine and Health Management, Hebei University, Baoding, China.
authors.forename: Mengmeng
authors.initials: M
authors.lastname: Gao
authors.affiliation: Key Laboratory of Medicinal Chemistry and Molecular Diagnosis, Department of Preventive Medicine and Health Management, Hebei University, Baoding, China.
authors.forename: Hongyuan
authors.initials: H
authors.lastname: Yan
keywords: Dispersive solid-phase extraction; Ionic liquids; Magnetic microspheres; Molecularly imprinted polymers; Organochlorine pesticides