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首页> 外文期刊>Journal of chromatography, A: Including electrophoresis and other separation methods >Preconcentration of emerging contaminants in environmental water samples by using silica supported Fe_3O_4 magnetic nanoparticles for improving mass detection in capillary liquid chromatography
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Preconcentration of emerging contaminants in environmental water samples by using silica supported Fe_3O_4 magnetic nanoparticles for improving mass detection in capillary liquid chromatography

机译：使用二氧化硅负载的Fe_3O_4磁性纳米粒子对环境水样品中的新兴污染物进行预浓缩以改善毛细管液相色谱中的质量检测

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摘要

A magnetic material based on Fe_3O_4 magnetic nanoparticles incorporated in a silica matrix by using a sol-gel procedure has been used to extract and preconcentrate emerging contaminants such as acetylsalicylic acid, acetaminophen, diclofenac and ibuprofen from environmental water samples prior to the analysis with Capillary LC-MS. The use of the proposed silica supported Fe_3O_4 magnetic nanoparticles enables surfactant free extracts for the analysis with MS detection without interferences in the ionisation step. Under the optimum conditions, we demonstrated the reusability of the magnetic sorbent material during 20 uses without loss in the extraction efficiency. In addition, no cleanup was necessary. The preconcentration factor was 100 and the detection limits were between 50 and 150ng/L. The proposed procedure has been applied to the analysis of water samples obtaining recoveries between 80 and 110% and RSD values lower than 12%. Concentrations of the target analytes over the range 1.7 and 0.1μg/L have been found in different water samples.
机译：在通过毛细管液相色谱进行分析之前，已经使用通过使用溶胶-凝胶方法将Fe_3O_4磁性纳米粒子掺入二氧化硅基质的磁性材料来提取和预浓缩环境水样品中的新兴污染物，例如乙酰水杨酸，对乙酰氨基酚，双氯芬酸和布洛芬。 -多发性硬化症。所提出的二氧化硅负载的Fe_3O_4磁性纳米粒子的使用使得无表面活性剂的提取物可用于MS检测分析，而不会干扰电离步骤。在最佳条件下，我们证明了磁性吸附材料在20次使用过程中的可重复使用性，而不会降低提取效率。此外，无需清理。预浓缩因子为100，检出限为50至150ng / L。拟议的程序已应用于水样的分析，回收率在80％至110％之间，RSD值低于12％。在不同的水样中发现目标分析物的浓度在1.7和0.1μg/ L的范围内。

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