Tag Archives: CE

Evaluation of dispersive liquid-liquid microextraction for the determination of patulin in apple juices using micellar electrokinetic capillary chromatography

Posted on 8 January, 2013 by fqm302

Patulin (PAT) is a mycotoxin naturally found in fruits, including apples. Its occurrence as a natural contaminant of fruit juices is indicative of fruit quality in production. The European Union has set the maximum content of patulin in 50 μg/kg … Continue reading →

Posted in DLLME, Juice, MEKC, Mycotoxins, UV-vis | Tagged | Comments Off on Evaluation of dispersive liquid-liquid microextraction for the determination of patulin in apple juices using micellar electrokinetic capillary chromatography

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

Analysis of amino acids in latent fingerprint residue by capillary electrophoresis-mass spectrometry

Posted on 5 November, 2012 by fqm302

The analysis of the chemical composition of fingerprints is important for the development and improvement of existing fingerprint enhancement techniques. This study demonstrates the first analysis of a latent fingerprint sample, using an optimized CE-MS method. In total 12 amino … Continue reading →

Posted in Amino acids, CZE, Electrophoresis, Fingerprints, Mass spectrometry | Tagged , | Comments Off on Analysis of amino acids in latent fingerprint residue by capillary electrophoresis-mass spectrometry

Analysis of cephalosporin residues in environmental waters by capillary zone electrophoresis with off-line and on-line preconcentration

Posted on 1 August, 2012 by fqm302

A sensitive and reliable method using capillary zone electrophoresis with UV-diode array detection (CZE-DAD) has been developed and validated for trace determination of cephalosporin antibiotics in spring water, groundwater and river water matrices. Due to the lack of sensitivity of … Continue reading →

Posted in Antibiotics, CZE, Cephalosporins, LVSS, SPE, UV-vis, Water | Tagged | Comments Off on Analysis of cephalosporin residues in environmental waters by capillary zone electrophoresis with off-line and on-line preconcentration

Determination of 5-nitroimidazoles and metabolites in environmental samples by micellar electrokinetic chromatography

Posted on 13 July, 2012 by fqm302

A method based on micellar electrokinetic chromatography (MEKC) with UV detection has been developed for the determination of nine 5-nitroimidazoles (5-NDZs), including metabolites in river water samples. Due to the relative insensitivity of UV detection in MEKC, a solid-phase extraction … Continue reading →

Posted in 5-nitroimidazoles, MEKC, SPE, Sweeping, UV-vis, Water | Tagged | Comments Off on Determination of 5-nitroimidazoles and metabolites in environmental samples by micellar electrokinetic chromatography

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

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

On-line preconcentration for the determination of aflatoxins in rice samples by micellar electrokinetic capillary chromatography with laser induced fluorescence detection

Posted on 30 June, 2010 by fqm302

MEKC coupling with LIF detection has been used for the determination of four aflatoxins (B1, B2, G1 and G2). Separations were performed in an uncoated fused-silica capillary (70 cm×75 μm id, 55 cm effective length), using 20 mM borate buffer with 30 mM SDS (pH … Continue reading →

Posted in Fluorescence, LIF, MEKC, Mycotoxins, Rice, Stacking | Tagged | Comments Off on On-line preconcentration for the determination of aflatoxins in rice samples by micellar electrokinetic capillary chromatography with laser induced fluorescence detection

Advances and analytical applications in chemiluminescence coupled to capillary electrophoresis

Posted on 18 June, 2010 by fqm302

The present review presents the state of the art of the developments, key strategies and analytical applications of chemiluminescence detection coupled to CE (CE-CL). Different parts considering the most common CL systems have been included, such as the tris(2,2′-bipyridine)ruthenium(II) system, … Continue reading →

Posted in Chemiluminescence, Electrophoresis, Review | Tagged , | Comments Off on Advances and analytical applications in chemiluminescence coupled to capillary electrophoresis