Determination of ionic liquid cations in soil samples by ultrasound-assisted solid-phase extraction coupled with liquid chromatography-tandem mass spectrometry

Abstract

Liquid chromatography-tandem mass spectrometry coupled with an ultrasonic-assisted extraction and solid phase extraction procedure has been investigated for the separation and detection of ionic liquid cations in soil samples.

First Quantification of Imidazoles in Ambient Aerosol Particles: Potential Photosensitizers, Brown Carbon Constituents, and Hazardous Components

“…Only little qualitative evidence for imidazoles was found in generated biomass burning aerosol and in HULIS extracts from ambient filter samples by using electrospray ionization-mass spectrometry (ESI-MS). , To the best of the authors’ knowledge, quantitative information on typical concentrations of imidazoles in ambient aerosol particles is not available from the literature. Various analytical techniques are available to determine imidazoles in different matrices, such as food and beverages or environmental water samples. ,,− Due to their alkaline nature, imidazoles are often detected as cations. Pretreatment for sample cleanup and preconcentration is often carried out by using solid phase extraction (SPE) cation exchange cartridges, when subsequent analysis by liquid chromatography (LC) or capillary electrophoresis (CE) is done.…”

Deep eutectic solvent-based liquid-phase microextraction for detection of plant growth regulators in edible vegetable oils

“…6,7 Due to the trace levels of PGRs in vegetable oils, and the complexity and high viscosity of the oil matrices, a simple and effective pretreatment process is needed to separate and preconcentrate the auxins prior to instrumental analysis. Up to now, the methods used for pretreating food matrices have mainly been dispersive liquidliquid microextraction (DLLME), [8][9][10] solid-phase extraction (SPE), [11][12][13][14][15] solid-phase microextraction (SPME), [16][17][18][19][20] single-drop microextraction 21,22 and hollow-ber microextraction. 23,24 In the mid-to-late 1990s, liquid-phase microextraction (LPME) emerged as an alternative approach to prepare very small samples, due to its convenience of operation, rapidity, low cost, high recovery and enrichment capacity.…”

Hydrophilic interaction liquid chromatography for separation and determination of pyrrolidinium ionic liquid cations

“…[1][2][3][4][5] With the increasing awareness of environmental protection, ILs and their unique properties have attracted the interest of many researchers. [6][7][8] Due to their extremely low vapor pressure, ILs have been widely considered as "green solvents" that may be used to replace conventional molecular solvents. 9,10 In the development of processes based on ionic liquids, a simple, effective, and reliable analysis method is especially important for the detection and monitoring of their transport.…”