Universidad de Santiago de Compostela, Dpto. Química Analítica, Nutrición y Bromatología, Facultad de Ciencias, Alfonso X el Sabio s/n, 27002 Lugo, Spain.
Universidad de Santiago de Compostela, Dpto. Química Analítica, Nutrición y Bromatología, Facultad de Ciencias, Alfonso X el Sabio s/n, 27002 Lugo, Spain.
Anal Chim Acta. 2015 Sep 10;892:10-26. doi: 10.1016/j.aca.2015.07.046. Epub 2015 Aug 14.
Magnetic solid-phase extraction (M-SPE) is a procedure based on the use of magnetic sorbents for the separation and preconcentration of different organic and inorganic analytes from large sample volumes. The magnetic sorbent is added to the sample solution and the target analyte is adsorbed onto the surface of the magnetic sorbent particles (M-SPs). Analyte-M-SPs are separated from the sample solution by applying an external magnetic field and, after elution with the appropriate solvent, the recovered analyte is analyzed. This approach has several advantages over traditional solid phase extraction as it avoids time-consuming and tedious on-column SPE procedures and it provides a rapid and simple analyte separation that avoids the need for centrifugation or filtration steps. As a consequence, in the past few years a great deal of research has been focused on M-SPE, including the development of new sorbents and novel automation strategies. In recent years, the use of magnetic carbon nanotubes (M-CNTs) as a sorption substrate in M-SPE has become an active area of research. These materials have exceptional mechanical, electrical, optical and magnetic properties and they also have an extremely large surface area and varied possibilities for functionalization. This review covers the synthesis of M-CNTs and the different approaches for the use of these compounds in M-SPE. The performance, general characteristics and applications of M-SPE based on magnetic carbon nanotubes for organic and inorganic analysis have been evaluated on the basis of more than 110 references. Finally, some important challenges with respect the use of magnetic carbon nanotubes in M-SPE are discussed.
磁固相萃取（M-SPE）是一种基于使用磁性吸附剂从大体积样品中分离和预浓缩不同有机和无机分析物的方法。将磁性吸附剂添加到样品溶液中，目标分析物被吸附到磁性吸附剂颗粒（M-SP）的表面上。通过施加外部磁场将分析物-M-SP 与样品溶液分离，然后用适当的溶剂洗脱，回收的分析物进行分析。与传统的固相萃取相比，这种方法具有几个优点，因为它避免了耗时且繁琐的柱上 SPE 程序，并提供了快速且简单的分析物分离，避免了离心或过滤步骤的需要。因此，在过去几年中，人们对 M-SPE 进行了大量研究，包括开发新的吸附剂和新颖的自动化策略。近年来，磁性碳纳米管（M-CNTs）作为 M-SPE 中的吸附基质已成为一个活跃的研究领域。这些材料具有出色的机械、电气、光学和磁性特性，并且具有极大的表面积和多样化的功能化可能性。本综述涵盖了 M-CNTs 的合成以及这些化合物在 M-SPE 中的不同应用方法。基于超过 110 篇参考文献，评估了基于磁性碳纳米管的 M-SPE 在有机和无机分析中的性能、一般特征和应用。最后，讨论了在 M-SPE 中使用磁性碳纳米管的一些重要挑战。
