期刊
JOURNAL OF SEPARATION SCIENCE
卷 39, 期 7, 页码 1310-1315出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/jssc.201501165
关键词
Dispersive solid-phase extraction; Ionic liquids; Magnetic microspheres; Molecularly imprinted polymers; Organochlorine pesticides
资金
- National Natural Science Foundation of China [31301464]
- Natural Science Foundation of Hebei Province [B2015104013, B2015201132]
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%.
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