Evolution of dispersive liquid-liquid microextraction method.

265 Application of IL-DLLME in the Analysis of Pharmaceutical Entities 265 IL-DLLME in the Analysis of Metal Ions 266 Application of IL-DLLME in the Analysis of Organic Environmental Pollutants 266

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Ionic liquids in analytical chemistry: fundamentals, advances, and perspectives.

Miniaturized preconcentration methods based on liquid–liquid extraction and their application in inorganic ultratrace analysis and speciation: A review

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Recent developments in homogeneous and dispersive liquid-liquid extraction for inorganic elements determination. A review.

Recent development in liquid phase microextraction for determination of trace level concentration of metals—A review

A new simple and rapid dispersive liquid–liquid microextraction based on ionic liquid (IL) has been applied for the first time to preconcentrate trace levels of mercury as a prior step to its determination by spectrophotometric detection. In this method, small amount of an IL (1-hexyl-3-methylimmidazolium bis(trifluormethylsulfonyl)imid) as the extraction solvent was dissolved in acetone as the disperser solvent and the binary solution was then rapidly injected by a syringe into the water sample containing Hg cations which were complexed by 4,4′-bis(dimethylamino)thiobenzophenone (TMK) in the presence of sodium dodecyl sulphate as the anti-sticking agent. Thereby, a cloudy solution was formed and the Hg–TMK complex was extracted into the fine IL droplets. After centrifuging, the droplets of extractant were settled at the bottom of a conical test tube and the extracted phase was determined by spectrophotometry at 575 nm. Usually some parameters affect the complex formation and extraction, such as the type ...

Dispersive liquid–liquid microextraction based on ionic liquid and spectrophotometric determination of mercury in water samples

Cold-induced aggregation microextraction based on ionic liquids and fiber optic-linear array detection spectrophotometry of cobalt in water samples.

A new simple and rapid dispersive liquid–liquid microextraction has been applied to preconcentrate trace levels of cobalt as a prior step to its determination by spectrophotometric detection. In this method a small amount of chloroform as the extraction solvent was dissolved in pure ethanol as the disperser solvent, then the binary solution was rapidly injected by a syringe into the water sample containing cobalt ions complexed by 1-(2-pyridylazo)-2-naphthol (PAN). This forms a cloudy solution. The cloudy state was the result of chloroform fine droplets formation, which has been dispersed in bulk aqueous sample. Therefore, Co-PAN complex was extracted into the fine chloroform droplets. After centrifugation (2 min at 5000 rpm) these droplets were sedimented at the bottom of conical test tube (about 100 µL) and then the whole of complex enriched extracted phase was determined by a spectrophotometer at 577 nm. Complex formation and extraction are usually affected by some parameters, such as the types and vol...

Dispersive liquid–liquid microextraction and spectrophotometric determination of cobalt in water samples

Ionic liquid-based dispersive liquid-liquid microextraction and enhanced spectrophotometric determination of molybdenum (VI) in water and plant leaves samples by FO-LADS.

A novel, simple, fast, and efficient ionic liquid-based dispersive liquid–liquid extraction (IL-DLLE) has been applied to extract and remove Congo Red (CR; a carcinogenic textile dye) from aqueous solutions. In this methodology a binary solution, containing the extraction solvent (1-hexyl-3-methylimmidazolium bis(trifluormethylsulfonyl) imid) and a suitable disperser solvent, was rapidly injected into the water sample containing CR dye. Therewith, a cloudy solution was formed, and most of the dye molecules were extracted into fine IL droplets and removed from aqueous phase. The effects of pH, type, and amount of IL, initial concentration of the dye, type and volume of the dispersant, and concentrations of salt on the extraction of the dye were studied. Experimental surveys were also accomplished for recovery of the IL by applying a reverse dispersive liquid–liquid extraction using acidic stripping solutions.

Maysam Gharehbaghi

Papers

Dispersive liquid–liquid microextraction based on ionic liquid and spectrophotometric determination of mercury in water samples

Cold-induced aggregation microextraction based on ionic liquids and fiber optic-linear array detection spectrophotometry of cobalt in water samples.

Dispersive liquid–liquid microextraction and spectrophotometric determination of cobalt in water samples

Ionic liquid-based dispersive liquid-liquid microextraction and enhanced spectrophotometric determination of molybdenum (VI) in water and plant leaves samples by FO-LADS.

A Novel Method for Dye Removal: Ionic Liquid-Based Dispersive Liquid–Liquid Extraction (IL-DLLE)