Tian Yu, Xu Zhigang, Liu Zhimin, Si Xiaoxi, Zhang Fengmei, Jiang Wei
Faculty of Science, Kunming University of Science and Technology, Kunming 650500, China.
Faculty of Environmental Science & Engineering, Kunming University of Science and Technology, Kunming 650500, China.
Nanomaterials (Basel). 2022 Aug 24;12(17):2921. doi: 10.3390/nano12172921.
In the present study, silica-coated magnetic nanoparticles functionalized with vancomycin (FeO@SiO@VAN) were synthesized. The FeO@SiO@VAN nanocomposite was used as a sorbent for the magnetic solid-phase extraction (MSPE) of polycyclic aromatic hydrocarbons (PAHs) from environmental water, followed by GC-MS. The nanocomposite was characterized by Fourier-transform infrared spectroscopy, X-ray diffraction, scanning electron microscopy, transmission electron microscopy, vibrating sample magnetometry, and nitrogen sorption. Various experimental parameters were optimized, including extraction condition and desorption condition. Results show that FeO@SiO@VAN combined the advantages of nanomaterials and magnetic separation technology, showing excellent dispersibility and high selectivity for PAHs in environmental water sample. Under the optimal extraction conditions, an analytical method was established with the sensitive limit of detection (LOD) of 0.03-0.16 μg L. The method was successfully applied for the analysis of environmental water samples. The relative standard deviations (%) were in the range of 0.50-12.82%, and the extraction recovery (%) was in the range of 82.48% and 116.32%. MSPE-coupled gas chromatography-mass spectrometry quantification of PAHs is an accurate and repeatable method for the monitoring of PAH accumulation in environmental water samples. It also provides an effective strategy for the tracing and quantification of other environmental pollutants in complex samples.
在本研究中，合成了用万古霉素功能化的二氧化硅包覆磁性纳米颗粒（FeO@SiO@VAN）。FeO@SiO@VAN纳米复合材料用作从环境水中磁性固相萃取（MSPE）多环芳烃（PAHs）的吸附剂，随后进行气相色谱-质谱联用分析。通过傅里叶变换红外光谱、X射线衍射、扫描电子显微镜、透射电子显微镜、振动样品磁强计和氮吸附对该纳米复合材料进行了表征。对各种实验参数进行了优化，包括萃取条件和解吸条件。结果表明，FeO@SiO@VAN结合了纳米材料和磁分离技术的优点，对环境水样中的多环芳烃表现出优异的分散性和高选择性。在最佳萃取条件下，建立了一种分析方法，其检测限（LOD）为0.03 - 0.16 μg/L。该方法成功应用于环境水样分析。相对标准偏差（%）在0.50 - 12.82%范围内，萃取回收率（%）在82.48%至116.32%范围内。MSPE与气相色谱-质谱联用对多环芳烃进行定量分析是一种准确且可重复的方法，用于监测环境水样中多环芳烃的积累情况。它还为复杂样品中其他环境污染物的追踪和定量提供了一种有效策略。
