نتایج جستجو برای: ultrasound assisted emulsification microextraction silver

تعداد نتایج: 284277  

For the first time, a novel and efficient ionic liquid-based ultrasound-assisted in-situ solvent formation microextraction (IL-UA-ISFME) combined with high-performance liquid chromatography-ultraviolet detection (HPLC-UV) has been successfully developed for the determination of duloxetine (DLX) in human plasma. Herein, an environmentally-friendly hydrophobic ionic liquid (1-butyl-3-methylimidaz...

Journal: :Scientific Reports 2021

Abstract A rapid, sensitive, economically and ecologically friendly method based on one-step ultrasound-assisted emulsification microextraction in situ derivatization followed by gas chromatography–mass spectrometry for simultaneous determination of low molecular benzotriazoles benzotriazole-based ultraviolet filters was developed. The optimized allows quantification benzotriazole, 4-methylbenz...

2011
Chang - Myeon Lee Min - Hyung Lee Jin - Young Hur Ho - Nyun Lee

An ultrasound-assisted activation method for electroless silver plating is presented in this study. When the ultrasound was applied during the activation step, the amount of the Pd species adsorbed on substrate surfaces was higher than that of sample pretreated with a conventional activation process without ultrasound irradiation. With this activation method, it was also shown that the adsorbed...

2016
Justyna Kapelewska Urszula Kotowska Katarzyna Wiśniewska

Determination of the endocrine disrupting compounds (EDCs) in leachate and groundwater samples from the landfill sites is very important because of the proven harmful effects of these compounds on human and animal organisms. A method combining ultrasound-assisted emulsification microextraction (USAEME) and gas chromatography-mass spectrometry (GC-MS) was developed for simultaneous determination...

2017
Marzieh Sadeghi Ehsan Rostami Davood Kordestani Hojat Veisi Mojtaba Shamsipur

Dispersive solid-phase extraction (DSPE) combined with ultrasound-assisted emulsification microextraction (UAEME) has been developed as a novel approach for the determination of lead and cadmium in food and environmental samples prior to graphite furnace atomic absorption spectrometry. SBA-15/CCMet was synthesized and used as a new sorbent for the extraction of metal ions in DSPE. It was charac...

2014
Urszula Kotowska Justyna Kapelewska Joanna Sturgulewska

A method combining ultrasound-assisted emulsification-microextraction (USAEME) with gas chromatography-mass spectrometry (GC-MS) was developed for simultaneous determination of four acidic pharmaceuticals, ibuprofen, naproxen, ketoprofen, and diclofenac, as well as four phenols, 4-octylphenol, 4-n-nonylphenol, bisphenol A, and triclosan in municipal wastewaters. Conditions of extraction and sim...

Journal: :Journal of chromatography. A 2014
Iván P Román Anna Mastromichali Konstantina Tyrovola Antonio Canals Elefteria Psillakis

Vortex-assisted liquid-liquid microextraction (VALLME) coupled with high-performance liquid chromatography (HPLC) is proposed here for the rapid determination of octanol-water partitioning coefficients (Kow). VALLME uses vortex agitation, a mild emulsification procedure, to disperse microvolumes of octanol in the aqueous phase thus increasing the interfacial contact area and ensuring faster par...

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