Category Archives: Electrophoresis

Capillary electrophoresis for the analysis of drugs of abuse in biological specimens of forensic interest

Posted on 21 December, 2011 by fqm302

We review analytical methodologies using capillary electrophoresis and related  techniques (micellar electrokinetic chromatography and capillary electrochromatography) with detection systems (ultraviolet-visible spectrometry, fluorescence, laser-induced fluorescence and mass spectrometry) for quantification of drugs of abuse and their metabolites in biological specimens of … Continue reading →

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Desarrollo de un método MEKC para la determinación de 5-nitroimidazoles en aguas de río

Posted on 20 September, 2011 by fqm302

Los 5-nitroimidazoles (5-NDZs) son antimicrobianos con propiedades antibacterianas y antiprotozoarias. Debido a estas características se ha extendido su uso tanto como antibióticos humanos como veterinarios, mostrando eficacia contra la mayoría de bacterias anaerobias Gram negativas y algunas Gram positivas (Bacteroides … Continue reading →

Posted in 5-nitroimidazoles, Drugs, MEKC, SPE, Trabajo fin máster, UV-vis, Water | Comments Off on Desarrollo de un método MEKC para la determinación de 5-nitroimidazoles en aguas de río

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 →

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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 →

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Trace determination of sulfonylurea herbicides in water and grape samples by capillary zone electrophoresis using large volume sample stacking

Posted on 23 May, 2010 by fqm302

A sensitive and reliable method using capillary zone electrophoresis with UV-diode array detection has been developed and validated for trace determination of residues of sulfonylurea herbicides in environmental water samples and grapes from different origins. The analytes included are triasulfuron, … Continue reading →

Posted in CZE, Electrophoresis, Food, Fruit, Pesticides, Stacking, Sulfonylurea, UV-vis, Water | Tagged | Comments Off on Trace determination of sulfonylurea herbicides in water and grape samples by capillary zone electrophoresis using large volume sample stacking

Advances in chemiluminescence detection in HPLC and capillary electrophoresis

Posted on 23 April, 2010 by fqm302

During the last two decades, the use of chemiluminescence (CL) in liquid phase has provided a well-established and widely applied spectrometric branch of Analytical Chemistry. The versatility of this technique permits the determination of a great variety of species that … Continue reading →

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Laser induced fluorescence coupled to capillary electrophoresis for the determination of fluoroquinolones in foods of animal origin using molecularly imprinted polymers

Posted on 17 February, 2010 by fqm302

A method for the simultaneous determination of four fluoroquinolones of veterinary use (ciprofloxacin, danofloxacin, enrofloxacin and sarafloxacin) in two complex matrixes, such as bovine raw milk and pig kidney, has been established and validated. The method is based on the … Continue reading →

Posted in Antibiotics, CZE, Electrophoresis, Fluorescence, Food, LIF, MIPs, Milk, Pig kidney, Quinolones, Sample treatment | Tagged | Comments Off on Laser induced fluorescence coupled to capillary electrophoresis for the determination of fluoroquinolones in foods of animal origin using molecularly imprinted polymers

Sensitive determination of fluoroquinolone residues in waters by capillary electrophoresis with laser induced fluorescence detection

Posted on 9 February, 2010 by fqm302

A sensitive capillary electrophoresis –laser-induced fluorescence method has been developed for the determination of six fluoroquinolones of human (ofloxacin, lomefloxacin, and norfloxacin) and veterinary use (danofloxacin, enrofloxacin, and sarafloxacin) in different kinds of water. Fluorescence detection was achieved using a … Continue reading →

Posted in Antibiotics, CZE, Electrophoresis, Fluorescence, LIF, Quinolones, SPE, Water | Tagged | Comments Off on Sensitive determination of fluoroquinolone residues in waters by capillary electrophoresis with laser induced fluorescence detection