多壁碳纳米管-分子印迹溶胶-凝胶复合材料的合成与应用：用于在线固相萃取和高效液相色谱法测定痕量苏丹 IV。
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.
机构信息
College of Chemistry and Chemical Engineering, Jishou University, Jishou 416000, China.
出版信息
Anal Chim Acta. 2010 Feb 28;661(2):173-80. doi: 10.1016/j.aca.2009.12.024. Epub 2009 Dec 24.
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.
一种新型的多壁碳纳米管（MWNTs）-苏丹 IV 分子印迹聚合物（MIPs）复合材料是通过表面分子印迹技术与溶胶-凝胶技术相结合制备的。MWNTs-MIPs 通过扫描电子显微镜（SEM）、傅里叶变换红外光谱（FT-IR）和吸附实验进行了评估。结果表明，MWNTs-MIPs 对苏丹 IV 表现出良好的选择性识别。最大饱和结合容量（Q（max））为 63.2 μmol g（-1）。作为吸附剂，MWNTs-MIPs 用于在线固相萃取-高效液相色谱法（SPE-HPLC）测定辣椒粉中的痕量苏丹 IV。结果表明，在 1.0 mL min（-1）的加载流速下，采样 50 mL 可实现 741 的富集因子。MWNTs-MIPs 为实际样品中苏丹 IV 的快速便捷测定提供了一个平台。
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