Journal
ANALYTICA CHIMICA ACTA
Volume 661, Issue 2, Pages 173-180Publisher
ELSEVIER
DOI: 10.1016/j.aca.2009.12.024
Keywords
Molecular imprinting; Multi-walled carbon nanotubes; Sudan IV; On-line solid-phase extraction; High-performance liquid chromatography
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A novel composite material of multi-walled carbon nanotubes (MWNTs)-Sudan IV molecularly imprinted polymers (MIPs) was prepared by Surface molecular imprinting technique in combination with sol-gel technology. The MWNTs-MIPs were evaluated by scanning electron micrograph(SEM), Fourier transform infrared spectroscopy (FT-IR), and adsorption experiments. The results showed that the MWNTs-MIPs exhibited good selective recognition to Sudan IV. The maximum saturated binding capacity (Q(max)) is 63.2 mu mol g(-1). Applied as sorbent, the MWNTs-MIPs were used for the determination of trace Sudan IV in chilli powder by on-line solid-phase extraction-high-performance liquid chromatography(SPE-HPLC). The results showed that an enrichment factor of 741 was achieved with a loading flow rate of 1.0 mL min(-1) for sampling 50 mL. The MWNTs-MIPs provided a fast and convenience determination platform for Sudan IV in real samples. (C) 2010 Elsevier B.V. All rights reserved.
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