A new analytical method based on vortex-assisted liquid-liquid microextraction with back extraction (VALLME-BE) coupled high performance liquid chromatography was developed for the simultaneous determination of antidiabetic drugs; repaglinide, glibenclamide, and glimepiride in water samples. Chromatographic separation achieved using C18 column (250 × 4.6 mm 5 µm) methanol-phosphate buffer (pH3....

ABSTRACT. In this paper, effervescence-assisted dispersive liquid-liquid microextraction method has been developed for the extraction and preconcentration of organochlorine pesticides in water samples before their determination by gas chromatography-mass spectrometry. The involves in-situ generation CO2 bubbles to induce dispersion solvent aqueous sample. Different parameters affecting efficien...

An efficient dispersive liquid-liquid microextraction using tetraalkylammonium bromide coated silver nanoparticles (DLLME-AgNPs) prepared in chloroform has been successfully applied as electrostatic affinity probes to the microextraction and preconcentration of terazosin prior to spectrofluorimetry analysis. This technique is based on a ternary system of solvents, where appropriate amount of mi...

Combination of solid-phase microextraction with gas chromatography enables rapid, repeated analysis of organic compounds in water. Fluazifop-p-butyl (FPB) (propanoic acid 2-[4-[[5-(trifluoromethyl)-2-pyridinyl]oxy]phenoxy] butyl ester) is the active substance in the herbicide Fusilade. Samples of distilled water were spiked with FPB in the laboratory and the analyte was isolated from the water ...

The environmental performance of a combined cooling, heating, and power system is analyzed in this study at component-level using SPECO-based exergoenvironmental analysis. engine consumes natural gas produces 168.6 kW net power. waste heat recovered by LiBr-H2O absorption chiller exchanger, which are used for cooling heating purposes. energy assisted solar field. An Life Cycle Assessment quanti...