Journal
ANALYTICA CHIMICA ACTA
Volume 674, Issue 1, Pages 53-58Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.aca.2010.06.018
Keywords
Molecularly imprinted polymer; Solid-phase micro-extraction; Fiber; Dibutyl phthalate
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Funding
- MoniQA [FOOD-CT-2006-036337]
- Henan Key Foundation of Science and Technology [0422031200]
- Natural Science Foundation of Education Department of Henan Province [2010A150006]
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A novel molecularly imprinted polymer (MIP) that was applied to a solid-phase micro-extraction (SPME) device, which could be coupled directly to gas chromatograph and mass spectrometer (GC/MS), was prepared using dibutyl phthalate (DBP) as the template molecule. The characteristics and application of this fiber were investigated. Electron microscope images indicated that the MW-coated solid-phase micro-extraction (MI-SPME) fibers were homogeneous and porous. The extraction yield of DBP with the MI-SPME fibers was higher than that of the non-imprinted polymer (NIP)-coated SPME (NI-SPME) fibers. The MI-SPME fibers had a higher selectivity to other phthalates that had similar structures as DBP. A method was developed for the determination of phthalates using MI-SPME fibers coupled with GC/MS. The extraction conditions were optimized. Detection limits for the phthalate samples were within the range of 2.17-20.84 ng L(-1). The method was applied to five kinds of phthalates dissolved in spiked aqueous samples and resulted in recoveries of up to 94.54-105.34%, respectively. Thus, the MI-SPME fibers are suitable for the extraction of trace phthalates in complicated samples. (C) 2010 Elsevier B.V. All rights reserved.
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