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Surface-bonded ionic liquid stationary phases in high-performance liquid chromatography—A review

Pino, Verónica ; Afonso, Ana M.

Analytica chimica acta, 2012-02, Vol.714, p.20-37 [Periódico revisado por pares]

Amsterdam: Elsevier B.V

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  • Título:
    Surface-bonded ionic liquid stationary phases in high-performance liquid chromatography—A review
  • Autor: Pino, Verónica ; Afonso, Ana M.
  • Assuntos: Analytical chemistry ; Charge ; Chemistry ; Chromatographic methods and physical methods associated with chromatography ; Chromatography ; Exact sciences and technology ; High-performance liquid chromatography ; Ionic liquids ; Liquids ; Mathematical analysis ; Other chromatographic methods ; Phases ; Solvents ; State of the art ; Stationary phases ; Surface confined ionic liquids
  • É parte de: Analytica chimica acta, 2012-02, Vol.714, p.20-37
  • Notas: ObjectType-Article-1
    SourceType-Scholarly Journals-1
    ObjectType-Feature-2
    content type line 23
  • Descrição: [Display omitted] ► SCILs are very interesting stationary phases for HPLC. ► They show a multimodal behavior: hydrophobic, electrostatic, and hydrogen bonding. ► The state-of-the-art is reviewed: preparation, chromatographic behavior, and performance. Ionic liquids (ILs) are a class of ionic, nonmolecular solvents which remain in liquid state at temperatures below 100 °C. ILs possess a variety of properties including low to negligible vapor pressure, high thermal stability, miscibility with water or a variety of organic solvents, and variable viscosity. IL-modified silica as novel high-performance liquid chromatography (HPLC) stationary phases have attracted considerable attention for their differential behavior and low free-silanol activity. Indeed, around 21 surface-confined ionic liquids (SCIL) stationary phases have been developed in the last six years. Their chromatographic behavior has been studied, and, despite the presence of a positive charge on the stationary phase, they showed considerable promise for the separation of neutral solutes (not only basic analytes), when operated in reversed phase mode. This aspect points to the potential for truly multimodal stationary phases. This review attempts to summarize the state-of-the-art about SCIL phases including their preparation, chromatographic behavior, and analytical performance.
  • Editor: Amsterdam: Elsevier B.V
  • Idioma: Inglês
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  • Realização: ABCD-USP USP   Logos de Redes Sociais: Freepik

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