Category Archives: DLLME

Dispersive liquid-liquid microextraction prior to field-amplified sample injection for the sensitive analysis of 3,4- methylenedioxymetamphetamine, phencyclidine and lysergic acid diethylamide by capillary electrophoresis in human urine

Posted on 13 November, 2012 by fqm302

A novel capillary zone electrophoresis (CZE) with ultraviolet detection method has been developed and validated for the analysis of 3,4-methylenedioxymethamphetamine (MDMA), lysergic acid diethylamide (LSD) and phencyclidine (PCP) in human urine. The separation of these three analytes has been achieved … Continue reading →

Posted in Biological fluids, CZE, DLLME, Drugs, Electrophoresis, FASI, UV-vis, Urine | Tagged | Comments Off on Dispersive liquid-liquid microextraction prior to field-amplified sample injection for the sensitive analysis of 3,4- methylenedioxymetamphetamine, phencyclidine and lysergic acid diethylamide by capillary electrophoresis in human urine

Determination of ochratoxin A in wines by capillary liquid chromatography with laser induced fluorescence detection using dispersive liquid–liquid microextraction

Posted on 26 June, 2012 by fqm302

A method based on reverse phase capillary high performance liquid chromatography (capillary HPLC) coupled to laser-induced fluorescence detection (LIF) has been proposed for the determination of ochratoxin A (OTA) in wine samples. An anionic micellar medium was added to the … Continue reading →

Posted in Capillary HPLC, DLLME, LIF, Mycotoxins, Wine | Tagged | Comments Off on Determination of ochratoxin A in wines by capillary liquid chromatography with laser induced fluorescence detection using dispersive liquid–liquid microextraction

Dispersive liquid-liquid microextraction using a low density extraction solvent for the determination of 17 N-methylcarbamates by micellar electrokinetic chromatography-electrospray-mass spectrometry employing a volatile surfactant

Posted on 23 June, 2012 by fqm302

A new analytical method based on micellar electrokinetic chromatography tandem mass spectrometry (MEKC–ESI–MS/MS) employing a MS friendly surfactant (ammonium perfluorooctanoate) is proposed and validated for the identification and simultaneous quantification of 17 N-methylcarbamate pesticides in environmental and drinking water samples. … Continue reading →

Posted in Carbamates, DLLME, MEKC, Mass spectrometry, Water | Tagged | Comments Off on Dispersive liquid-liquid microextraction using a low density extraction solvent for the determination of 17 N-methylcarbamates by micellar electrokinetic chromatography-electrospray-mass spectrometry employing a volatile surfactant

Comparison of different sample treatments for the analysis of ochratoxin A in wine by capillary HPLC with laser-induced fluorescence detection

Posted on 2 November, 2011 by fqm302

Ochratoxin A (OTA) is a mycotoxin naturally found in various foods, including wine. As OTA is considered as a possible human carcinogen, the maximum concentration for this compound has been established at 2 μg kg−1 in wine by the EU (Directive (CE) … Continue reading →

Posted in Capillary HPLC, DLLME, Ionic liquids, LIF, Mycotoxins, QuEChERS, Wine | Tagged | Comments Off on Comparison of different sample treatments for the analysis of ochratoxin A in wine by capillary HPLC with laser-induced fluorescence detection

Evaluación de la microextracción líquido-líquido dispersiva para la determinación de patulina en zumos de manzana mediante electroforesis capilar

Posted on 20 September, 2011 by fqm302

La contaminación microbiológica de los alimentos es la causa principal de las enfermedades de origen alimentario. Dentro de este tipo de contaminación destacan las micotoxinas, sustancias producidas por ciertos hongos pertenecientes principalmente a los géneros Aspergillus, Fusarium y Penicillium. Estas … Continue reading →

Posted in DLLME, Juice, MEKC, Mycotoxins, Trabajo fin máster, UV-vis | Tagged | Comments Off on Evaluación de la microextracción líquido-líquido dispersiva para la determinación de patulina en zumos de manzana mediante electroforesis capilar

Use of dispersive liquid–liquid microextraction for the determination of carbamates in juice samples by sweeping-micellar electrokinetic chromatography

Posted on 25 April, 2011 by fqm302

Dispersive liquid–liquid microextraction (DLLME) has been proposed for the extraction and preconcentration of 12 carbamate pesticides in juice samples, followed by their determination by micellar electrokinetic chromatography with diode-array detection. To improve sensitivity, an on-capillary sample concentration method based on … Continue reading →

Posted in Carbamates, DLLME, Electrophoresis, Juice, MEKC, Stacking, UV-vis | Tagged | Comments Off on Use of dispersive liquid–liquid microextraction for the determination of carbamates in juice samples by sweeping-micellar electrokinetic chromatography