基礎講座 電気泳動(Electrophoresis)

A critical review of methods for characterisation of polyphenolic compounds in fruits and vegetables.

Evolution of dispersive liquid-liquid microextraction method.

Statistical designs and response surface techniques for the optimization of chromatographic systems

Ionic liquids (ILs) have been applied in different areas of separation, such as ionic liquid supported membranes, as mobile phase additives and surface-bonded stationary phases in chromatography separations and as the extraction solvent in sample preparations, because they can be composed from various cations and anions that change the properties and phase behavior of liquids Although the applications of ILs in separations are still in their early stages, the academic interest in ILs is increasing An overview of the principle applications of ILs in separation technology is present in this work Furthermore, the prospects of the ILs in separation techniques are discussed

https://www.mdpi.com/1420-3049/15/4/2405/pdf?view=inline

Recent Applications of Ionic Liquids in Separation Technology

Carbon nanotubes: Solid-phase extraction.

It is widely recognized that the QuEChERS (quick, easy, cheap, effective, rugged, and safe) method is relevant in pesticide residue analysis. Many official laboratories around the globe are routinely using it due to the advantages encapsulated in its name. However, the frontiers of the application of QuEChERS are not yet established. The method is effective for the analysis of other groups of compounds, including pharmaceuticals, mycotoxins, and polycyclic aromatic hydrocarbons, in a wide variety of complex matrices. This review article provides a general overview of the most relevant modifications of the QuEChERS method that have been widely accepted and applied (including both extraction and clean-up) and a general view of the different groups of compounds to which it has been fruitfully applied. We do not include those approaches where only half the method has been used.

Evolution and applications of the QuEChERS method

Carbon nanotubes applications in separation science: a review

One of the most important objectives of modern analytical chemistry is miniaturization, simplification and automation of the whole analytical procedure, especially to speed up sample treatment, which is currently the bottleneck of analysis. Introduction of dispersive liquid-liquid microextraction (DLLME) has greatly contributed to meeting this objective, due to its simplicity, rapidity of operation and low consumption of solvents and reagents. DLLME has attracted much interest from scientists working in separation science. Since its introduction in 2006 for preconcentration of organic analytes from water samples, a good number of works have reported efficient, quick extraction of organic or inorganic analytes. However, before using DLLME, there is a need to optimize carefully influential factors (e.g., types and volumes of extraction and disperser solvents, extraction time, sample amount, pH, and salt addition). The present review focuses on applications of DLLME for extracting organic analytes (e.g., pesticides, pharmaceuticals, polychlorinated biphenyls, and polybrominated diphenyl ethers) from the time that DLLME was introduced to the end of December 2009. We pay special attention to those works that represent an improvement in the technique and the most challenging applications.

Dispersive liquid-liquid microextraction for determination of organic analytes

Dispersive solid-phase extraction (dSPE) is a sorbent-based technique widely applied in sample preparation for both sample clean up or analite preconcentration. It shows considerable benefits over conventional SPE, especially in terms of the simplicity of the procedure. This chapter aims at providing a general overview of dSPE, its different extraction approaches (dSPE, µ-dSPE and magnetic-dSPE), and the principal factors which influence the extraction process (including the sorbents most frequently used) as well as its most common applications.



Keywords:

dispersive solid-phase extraction;
liquid-liquid extraction;
QuEChERS method;
sorbent-based technique

Javier Hernández-Borges

Papers

Carbon nanotubes: Solid-phase extraction.

Evolution and applications of the QuEChERS method

Carbon nanotubes applications in separation science: a review

Dispersive liquid-liquid microextraction for determination of organic analytes

Dispersive Solid‐Phase Extraction