Department of Analytical Chemistry, Marie Curie Building (Annex), Campus de Rabanales, University of Córdoba, E-14071 Córdoba, Spain.
Analyst. 2013 Oct 21;138(20):5913-9. doi: 10.1039/c3an00439b.
A novel method for the determination of atrazine, using liquid-liquid extraction assisted by a nanoparticles film formed in situ and composed of organic solvent stabilized-carbon nanoparticles, is described. The presence of nanoparticles located at the liquid-liquid interface reinforced the extraction of analyte from matrix prior to capillary electrophoresis (CE) analysis. Some influential experimental variables were optimized in order to enhance the extraction efficiency. The developed procedure confirmed that carbon nanoparticles, especially multi-walled carbon nanotubes, are suitable to be used in sample treatment processes introducing new mechanisms of interaction with the analyte. The application of the proposed preconcentration method followed by CE detection enabled the determination of atrazine in spiked river water providing acceptable RSD values (11.6%) and good recoveries (about 87.0-92.0%). Additionally, a similar extraction scheme was tested in soil matrices with a view to further applications in real soil samples.
一种新方法用于测定莠去津，采用液-液萃取辅助原位形成的纳米粒子膜，由有机溶剂稳定的碳纳米粒子组成。纳米粒子位于液-液界面的存在增强了分析物从基质中萃取，然后进行毛细管电泳（CE）分析。为了提高萃取效率，对一些有影响的实验变量进行了优化。所开发的程序证实，碳纳米粒子，特别是多壁碳纳米管，适合用于样品处理过程，引入与分析物相互作用的新机制。所提出的预浓缩方法的应用，随后进行 CE 检测，使得能够在加标河水样品中测定莠去津，提供可接受的 RSD 值（11.6%）和良好的回收率（约 87.0-92.0%）。此外，还测试了类似的萃取方案在土壤基质中的应用，以期进一步应用于实际土壤样品。
