Ionic liquid-based microextraction: A sample pretreatment technique for chromatographic analysis

Abstract

KEYWORDSIonic liquids (ILs), also known as molten salts with low melting points, are receiving an upsurge of interest as green solvents and form an attractive area of research. Within the last few years, research and applications of ILs as extraction solvents in sample pretreatment prior to chromatographic analysis have expanded tremendously. This review presents an overview of IL microextraction-based sample pretreatment techniques for high performance liquid chromatography (HPLC) and gas chromatography (GC).

Capabilities of several phosphonium ionic liquids for arsenic species determination in water by liquid–liquid microextraction and electrothermal atomic absorption spectrometry

“…Recently, ionic liquids (ILs) have emerged as very attractive alternatives to replace regular organic solvents because of their undetectable vapor pressure. 14 In fact, different As species have been determined by LLME and preconcentration methods using ILs. 8,15 The IL-LLME technique has been used for As determination through complexation with DDTC (sodium diethyldithiocarbamate) 15 and ADPC (ammonium pyrrolidinedithiocarbamate).…”

Ionic‐liquid‐based dispersive liquid–liquid microextraction combined with high‐performance liquid chromatography for the determination of multiclass pesticide residues in water samples

“…To overcome this limitation, nowadays, great attentions have been devoted to replace chlorinated solvents with more environmentally friendly ones: using solvents lighter than water (e.g. long‐chain alcohols or hydrocarbons) and room‐temperature ionic liquids (RTILs) …”

“…To overcome this limitation, nowadays, great attentions have been devoted to replace chlorinated solvents with more environmentally friendly ones: using solvents lighter than water (e.g. long-chain alcohols or hydrocarbons) and roomtemperature ionic liquids (RTILs) [21][22][23] RTILs are ILs that are liquid at or below room temperature [19]. They have several unique properties such as low vapor pressure, high stability, high viscosity, moderate solubility in organic compounds, tunable miscibility and polarity, and appreciable extraction capacity of different organic and inorganic compounds [23].…”

Ultrasound-assisted magnetic solid-phase extraction based ionic liquid-coated Fe3O4@graphene for the determination of nitrobenzene compounds in environmental water samples

“…However, these methods are oen tedious, unfriendly due to the usage of toxic organic solvents, or unstable and complicated extraction procedures. 11,12 Ionic liquids (ILs) composed of various types of organic cations and anions have been extensively applied to analytical chemistry as environmentally benign solvents because of their low vapor pressure, excellent thermal stability, and good dissolving capacity of numerous compounds. [12][13][14][15][16][17][18][19] The selfaggregation behavior of imidazolium-based ILs makes their successful application as adsorbents in magnetic mixed hemimicelles solid phase extraction, which combines the advantages of both ILs and magnetic materials.…”