Analytical Microextraction Techniques


M. Valcárcel, S. Cárdenas, R. Lucena

DOI: 10.2174/97816810837971170101
eISBN: 978-1-68108-379-7, 2016
ISBN: 978-1-68108-380-3

Indexed in: EBSCO.

Sample treatment has been the focus of intensive research in the last 20 years since it still remains a bottleneck in precise analytic...[view complete introduction]
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Ionic Liquids in the Microextraction Context

- Pp. 70-134 (65)

María J. Trujillo-Rodríguez, Verónica Pino, Juan H. Ayala and Ana M. Afonso


The structural versatility of ionic liquids (ILs), the wide range of interest properties that can present: low to negligible vapor pressure, from water-soluble to water-insoluble, from medium viscosity to high viscosity…, their synthetic tuneability, together with their impressive solvation abilities for analytes of quite different nature, make their use in microextraction techniques an obvious approach of great interest.

Thus, ILs and a group of interesting derivatives, such as polymeric ionic liquids (PILs) and IL-based surfactants, pure, mixed, or combined with other materials forming hybrid sorbents, have been used in all variants of liquid-phase and solid-based microextraction strategies.

This chapter will give an exhaustive overview of existing approaches that combine ILs and derivatives in liquid-phase microextraction (LPME) modes such as single-drop microextraction (SDME), hollow fiber liquid-phase microextraction (HF-LPME) and dispersive liquid-liquid microextraction (DLLME), including all their variants; and also in solid-based microextraction methods, such as micro-solid-phase extraction (μ-SPE), solid-phase microextraction (SPME), stir-bar sorptive extraction (SBSE), and stir-cake sorptive extraction (SCSE).

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