Synthesis and application of multi-walled carbon nanotubes-molecularly imprinted sol-gel composite material for on-line solid-phase extraction and high-performance liquid chromatography determination of trace Sudan IV

Zhaohui Zhang; Huabin Zhang; Yufang Hu; Shouzhuo Yao

doi:10.1016/j.aca.2009.12.024

Synthesis and application of multi-walled carbon nanotubes-molecularly imprinted sol-gel composite material for on-line solid-phase extraction and high-performance liquid chromatography determination of trace Sudan IV

Anal Chim Acta. 2010 Feb 28;661(2):173-80. doi: 10.1016/j.aca.2009.12.024. Epub 2009 Dec 24.

Authors

Zhaohui Zhang¹, Huabin Zhang, Yufang Hu, Shouzhuo Yao

Affiliation

¹ College of Chemistry and Chemical Engineering, Jishou University, Jishou 416000, China. zhaohuizhang77@hotmail.com

PMID: 20113732
DOI: 10.1016/j.aca.2009.12.024

Abstract

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 micromol 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.