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Supercritical fluid extraction (SFE) combined with dispersive liquid–liquid microextraction (DLLME) followed by gas chromatography with flame ionization detector (GC-FID) was developed for the extraction and determination of 4-nitrotoluene and 3-nitrotoluene in soil sample. The effects of different SFE experimental parameters on the extraction recovery were studied simultaneously using a central composite...
A simple, rapid and efficient method for the preconcentration of methadone was developed using dispersive liquid–liquid microextraction (DLLME) followed by high performance liquid chromatography with ultra violet detection (HPLC–UV). The extraction method is based on the fast injection of a mixture of extracting and disperser solvents into the aqueous solution to form a cloudy ternary component solvent...
A rapid and sensitive method using two preconcentration techniques, dispersive liquid–liquid microextraction (DLLME) followed by reversed electrode polarity stacking mode (REPSM) was developed for the analysis of five organophosphorus pesticides (OPPs) by micellar electrokinetic chromatography (MEKC). Parameters that affect the efficiency of the extraction in DLLME and preconcentration by REPSM, such...
A novel microextraction technique, named in-situ metathesis reaction, combined with ultrasound-assisted ionic liquid dispersive liquid–liquid microextraction was developed for the determination of five phenylurea pesticides (i.e., diuron, diflubenzuron, teflubenzuron, flufenoxuron, and chlorfluazuron) in environmental water samples. In the developed method, 360μL LiNTf 2 aqueous solution (0...
A new method based on simultaneous derivatization and dispersive liquid–liquid microextraction in one step is developed for determination of five anilines in different aqueous samples. In this method, acetonitrile containing microlitre-level of butylchloroformate was rapidly injected into aqueous sample by a syringe. After centrifugation of the cloudy solution, the fine droplets of the butylchloroformate...
Ultrasound-assisted ionic liquid/ionic liquid-dispersive liquid–liquid microextraction (UA-IL/IL-DLLME) high-performance liquid chromatography was developed and applied to the extraction, separation and determination of sulfonamides in infant formula milk powder samples. The hydrophobic IL and hydrophilic IL were used as extraction solvent and dispersion solvent, respectively. The extraction procedure...
An effective, low solvent consumption, reduced cost and high throughput sample preparation method for the determination of four trihalomethanes (THMs) in tap and swimming pool water samples is presented. THMs extraction and concentration were performed by dispersive liquid–liquid microextraction (DLLME), based on the use of non-halogenated and low volatile solvents as extractants. Analytes were further...
A simple, fast and efficient method for the preconcentration of phthalate esters (PEs) in water samples was developed using magnetic stirring-assisted dispersive liquid–liquid microextraction (MSA-DLLME) followed by high performance liquid chromatography coupled with ultraviolet detection (HPLC–UV). This novel microextraction method is based on the fast injection of extracting solvent into the aqueous...
A novel method for the determination of sertraline using dispersive liquid–liquid microextraction (DLLME) coupled with capillary electrophoresis (CE) was developed. Acetone and dichloromethane were used as the disperser solvent and extraction solvent, respectively. A mixture of the extraction and disperser solvents was rapidly injected into a 1.0mL aqueous sample to form a cloudy solution. After the...
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