Journal
JOURNAL OF CHROMATOGRAPHY A
Volume 1218, Issue 16, Pages 2182-2188Publisher
ELSEVIER
DOI: 10.1016/j.chroma.2011.02.042
Keywords
Molecularly imprinted microsphere; Matrix solid-phase dispersion; Dispersive liquid-liquid microextraction; Sudan dyes; Egg yolk
Funding
- National Natural Science Foundation of China [20905019, 21011140338]
- Natural Science Foundation of Hebei Province [B2010000209]
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A new kind of aniline-naphthol molecularly imprinted microsphere (MIM) synthesized by aqueous suspension polymerization was applied as a selective sorbent of miniaturized matrix solid-phase dispersion combining with dispersive liquid-liquid microextraction (MSPD-DLLME) for the simultaneous determination of four Sudans in egg yolk samples. The solid sample was directly blended with MIM in MSPD procedure and the eluent of MSPD was used as the dispersive solvent of the followed DLLME for further purification and enrichment of the analytes before HPLC analysis. Good linearity for all the Sudan dyes was ranged from 0.02 mu g g(-1) to 2.0 mu g g(-1) (r(2) >= 0.9990) and their recoveries at three spiked levels were ranged from 87.2% to 103.5% with RSD less than 6.1% (n = 3). The presented MIM-MSPD-DLLME method combined the advantages of MIM, MSPD and DLLME, and could be applied for the determination of Sudans in complicated food samples. (C) 2011 Elsevier B.V. All rights reserved.
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