Journal
TALANTA
Volume 85, Issue 4, Pages 2100-2105Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.talanta.2011.07.061
Keywords
Molecularly imprinted microspheres; Dummy template polymerization; Solid-phase extraction; Dicofol; Aquatic products
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Funding
- National Natural Science Foundation of China [20905019, 21011140338]
- Natural Science Foundation of Hebei Province [B2010000209]
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The novel molecularly imprinted microsphere (MIM) that could be applied as special sorbent was synthesized by aqueous suspension polymerization using 1,1-bis(4-chlorophenyl)-1,2,2,2-tetrachloroethane (alpha-chloro-DDT) as the dummy template. The obtained MIM exhibited good recognition and selectivity to dicofol and it was successfully applied as selective sorbent of solid-phase extraction for the determination of dicofol from aquatic products. At the optimum conditions of the molecularly imprinted solid-phase extraction (MISPE) coupled with GC-ECD, good linearity for dicofol was achieved in a range 01 0.4-100 ng g(-1) (r(2) = 0.9995) and the recoveries at three spiked levels were ranged from 85.8% to 101.2% for aquatic products with the relative standard deviation (RSD) less than 5.6%. The presented MISPE-GC-ECD method exhibited the advantages of simplicity, selectivity and sensitivity, and could be potentially applied to the determination of dicofol in complicated aquatic products. (C) 2011 Elsevier B.V. All rights reserved.
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