Xin Xubo, Li Chunying, Sun Min, Guo Wenjuan, Feng Juanjuan
Key Laboratory of Interfacial Reaction & Sensing Analysis in Universities of Shandong, School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, PR China.
Key Laboratory of Interfacial Reaction & Sensing Analysis in Universities of Shandong, School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, PR China.
J Chromatogr A. 2024 Mar 29;1719:464767. doi: 10.1016/j.chroma.2024.464767. Epub 2024 Feb 24.
Based on the π-metal interaction between silver nanoparticles (AgNPs) and aromatic compounds, AgNPs were in-situ grown to melamine-formaldehyde (MF) aerogel for improving the extraction performance to polycyclic aromatic hydrocarbons (PAHs). The AgNPs/MF aerogel was regulated through varing the concentration of reactants, and characterized by scanning electron microscopy, X-ray photoelectron spectroscopy and X-ray powder diffraction. As a new extraction coating, the AgNPs/MF aerogel was coated to stainless-steel wires for in-tube solid-phase microextraction (IT-SPME). The extraction effects of MF aerogels before and after the modification of AgNPs were compared, and the AgNPs greatly improved the extraction ability for PAHs reaching to 166.4 %. Combining IT-SPME with high performance liquid chromatographic detection, an online analytical system was constructed. Furthermore, the sampling volume and rate, concentration of organic solvent, and desorption time were optimized factor by factor. The online analytical method with low detection limits (0.003-0.010 μg L) and efficient enrichment factors (1998-3237) for PAHs was established, which fastly detected trace level of PAHs in drinking and environmental water samples. Compared with other methods, the method was comparable or better in the detection limit and linear range, indicating prospective application of the AgNPs/MF aerogel for sample preparation.
基于银纳米颗粒（AgNPs）与芳香族化合物之间的π-金属相互作用，将AgNPs原位生长到三聚氰胺-甲醛（MF）气凝胶上，以提高对多环芳烃（PAHs）的萃取性能。通过改变反应物浓度对AgNPs/MF气凝胶进行调控，并采用扫描电子显微镜、X射线光电子能谱和X射线粉末衍射对其进行表征。作为一种新型萃取涂层，将AgNPs/MF气凝胶涂覆在不锈钢丝上用于管内固相微萃取（IT-SPME）。比较了AgNPs改性前后MF气凝胶的萃取效果，AgNPs大大提高了对PAHs的萃取能力，达到了166.4%。将IT-SPME与高效液相色谱检测相结合，构建了一个在线分析系统。此外，对进样体积和速率、有机溶剂浓度和解吸时间逐一进行了优化。建立了对PAHs具有低检测限（0.003 - 0.010 μg/L）和高效富集因子（1998 - 3237）的在线分析方法，该方法可快速检测饮用水和环境水样中的痕量PAHs。与其他方法相比，该方法在检测限和线性范围方面相当或更优，表明AgNPs/MF气凝胶在样品制备方面具有潜在的应用前景。
