Buscar
Mostrando ítems 21-30 de 385
Solvent-based de-emulsification dispersive liquid-liquid microextraction coupled with UPLC-MS/MS for the fast determination of ultratrace levels of nitrated and oxygenated polycyclic aromatic hydrocarbons in environmental samples
(Royal Society of Chemistry, 2018-02)
In this study, a new solvent-based de-emulsification dispersive liquid-liquid microextraction strategy followed by liquid chromatography-atmospheric pressure chemical ionization-tandem mass spectrometry has been developed ...
Development of a dispersive liquid-liquid microextraction technique for the analysis of aryloxyphenoxy-propionate herbicides in soy-based foods
(Elsevier Science, 2016-06)
In this work, an ionic liquid–dispersive liquid-liquid microextraction (IL-DLLME) method combined with liquid chromatography and diode-array detection (DAD) was used for the determination of four aryloxyphenoxy-propionate ...
Selective determination of inorganic cobalt in nutritional supplements by ultrasound-assisted temperature-controlled ionic liquid dispersive liquid phase microextraction and electrothermal atomic absorption spectrometry
(Elsevier Science, 2012-02)
In the present work, a simple and rapid analytical method based on application of ionic liquids (ILs) for inorganic Co(II) species (iCo) microextraction in a variety of nutrient supplements was developed. Inorganic Co was ...
Simultaneous determination of rosiglitazone and its metabolites in rat liver microsomal fraction using hollow-fiber liquid-phase microextraction for sample preparation
(WILEY-V C H VERLAG GMBH, 2010)
A three-phase hollow-fiber liquid-phase microextraction method for the analysis of rosiglitazone and its metabolites N-desmethyl rosiglitazone and p-hydroxy rosiglitazone in microsomal preparations is described for the ...
A simple and new reverse liquid-liquid microextraction for the automated spectrometric determination of doxycycline in chicken fat
(Elsevier, 2017-12-15)
This work presents a new, simple and inexpensive reverse liquid-liquid microextraction of doxycycline (DOC) from chicken fat. In this just 13 min extraction methodology, acidulated water, as extraction solvent (400 µL), ...
Ultra-trace Cr preconcentration in honey samples by magnetic ionic liquid dispersive liquid-liquid microextraction and electrothermal atomic absorption spectrometry
(Pergamon-Elsevier Science Ltd, 2020-07)
An analytical method based on the dispersive liquid-liquid microextraction (DLLME) technique, using a magnetic ionic liquid (MIL) as an extraction phase, was developed for ultra trace Cr determination in honey samples. The ...
Dispersive liquid–liquid microextraction of quinolones in porcine blood: Optimization of extraction procedure and CE separation using experimental design
(Wiley VCH Verlag, 2016-10)
A dispersive liquid–liquid microextraction procedure was developed to extract nine fluoroquinolones in porcine blood, six of which were quantified using a univariate calibration method. Extraction parameters including type ...
Enzymatic Digestion Coupled to Surfactant-Assisted Dispersive Liquid-Liquid Microextraction: A Mild Approach for Determining Polybrominated Diphenyl Ethers in Human Hair Sample
(Wiley Blackwell Publishing, Inc, 2020-02)
Enzymatic digestion, coupled to surfactant assisted-dispersive liquid-liquid microextraction (ED-SA-DLLME), is proposed as a mild innovative sample preparation methodology to determine polybrominated diphenyl ethers (PBDEs) ...