title: 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.
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.
authors.affiliation: College of Chemistry and Chemical Engineering, Jishou University, Jishou 416000, China. zhaohuizhang77@hotmail.com
authors.forename: Zhaohui
authors.initials: Z
authors.lastname: Zhang
authors.forename: Huabin
authors.initials: H
authors.lastname: Zhang
authors.forename: Yufang
authors.initials: Y
authors.lastname: Hu
authors.forename: Shouzhuo
authors.initials: S
authors.lastname: Yao