since solid-phase and liquid-phase microextraction (spme and lpme) were introduced, as effective solvent-free methods, many efforts have been made to improve their modes and applications. however, due to limitations with sensitivity and efficiency, researchers have focused on improving the performance of their basic primary modes. in this way, in recent years, different methods such as ultrason...

this study propose a new analytical protocol for the determination of benzene, xylene, toluene and styrene in water samples using homogeneous liquid-liquid microextraction via flotation assistance (hllme-fa) technique followed by gas chromatography-mass spectrometry (gc-ms). in this research, a special extraction cell was designed to facilitate collection of the low-density solvent extraction. ...

Aerobic biodegradation behaviour of nonylphenol propoxylates was investigated in two tests with different sewage sludge as inocula. The samples containing target compounds were pre-concentrated using dispersive liquid-liquid microextraction and analysed with the use of high performance liquid chromatography with tandem mass spectrometry. Both primary biodegradation and formation of different bi...

a sensitive, selective and effective ionic liquid-based single drop microextraction technique was developed by using ionic liquid, 1-hexyl-3-methylimidazolium hexafluorophosphate, c6mimpf6, coupled with electrothermal atomic absorption spectrometry (etaas) for the determination of copper and silver in environmental samples. dithizone was used as chelating agent. several factors that influence t...

The present research describes the use of directly suspended drop microextraction and air-assisted dispersive liquid-liquid microextraction method coupled with UV-Vis spectrophotometer for the analysis of doxepin in water and biological samples. Several important parameters which influence the extraction efficiencies of these two microextraction methods, such as the kind of extracting solven...

A simple and rapid microextraction procedure based on dispersive liquid-liquid microextraction (DLLME) coupled with gas chromatography-flame ionization detection (GC-FID) was developed for the extraction and analysis of 2-phenylethanol in rose water sample. In the proposed approach, carbon tetrachloride and ethanol were used as extraction and dispersive solvents, respectively. Some important pa...

The use of Crataegus species for the treatment cardiovascular ailments is widely distributed. Even then only a few are included in Pharmacopoeias. In this study bioactive flavonoids azarolus and pallasii were identified quantified comparison with well-known pharmaceutical product Crataegus; Crataegutt® Tropfen using reverse phase-high performance liquid chromatography. method developed simple, ...