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Recent Posts
- Assessing human exposure to pesticides and mycotoxins: optimization and validation of a method for multianalyte determination in urine samples.
- Capillary electrophoresis tandem mass spectrometry to determine multiclass cyanotoxins in reservoir water and spinach samples.
- Determination of bile acids in serum of pigs exposed to polychlorinated biphenyls by liquid chromatography-mass spectrometry.
- Mycotoxin occurrence in milk and durum wheat samples from Tunisia using dispersive liquid–liquid microextraction and liquid chromatography with fluorescence detection.
- Deeper insights into the effects of low dietary levels of polychlorinated biphenyls on pig metabolism using gas chromatography-high resolution mass spectrometry metabolomics.
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Author Archives: fqm302
Determination of carbamates at trace levels in water and cucumber by capillary liquid chromatography
A sensitive and reliable method using capillary HPLC with UV-diode array detection (DAD) has been developed and validated for trace determination of carbamate pesticides in cucumber and environmental water samples. The analytes, including carbofuran, carbaryl, methiocarb, promecarb, benthiocarb and fenoxycarb, … Continue reading
Posted in Capillary HPLC, Carbamates, Chromatography, Food, Pesticides, SPE, UV-vis, Vegetables, Water
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Comparison of different sample treatments for the analysis of ochratoxin A in wine by capillary HPLC with laser-induced fluorescence detection
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 HPLC
Comments Off on Comparison of different sample treatments for the analysis of ochratoxin A in wine by capillary HPLC with laser-induced fluorescence detection
Desarrollo de un método MEKC para la determinación de 5-nitroimidazoles en aguas de río
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
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Evaluación de la microextracción líquido-líquido dispersiva para la determinación de patulina en zumos de manzana mediante electroforesis capilar
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 CE
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Comparison of different sample treatments for the analysis of quinolones in milk by capillary-liquid chromatography with laser induced fluorescence detection
A simple and very sensitive capillary-liquid chromatography method coupled with laser induced fluorescence detection has been developed for the simultaneous determination of seven quinolones of veterinary use in milk. Moreover, a comparison between two different sample treatments (QuEChERS and molecularly … Continue reading
Posted in Capillary HPLC, LIF, MIPs, Milk, QuEChERS, Quinolones
Tagged HPLC
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Use of dispersive liquid–liquid microextraction for the determination of carbamates in juice samples by sweeping-micellar electrokinetic chromatography
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 CE
Comments Off on Use of dispersive liquid–liquid microextraction for the determination of carbamates in juice samples by sweeping-micellar electrokinetic chromatography
Analytical applications of photoinduced chemiluminescence in flow systems—A review
In this review, the recent evolution and the state of the art of photochemical reactions coupled with chemiluminescence processes are presented. Different chemiluminescence systems have been considered together with suitable photochemical derivatization processes that can affect either the analyte of … Continue reading
Posted in Chemiluminescence, Photoinduced, Review
Tagged CL
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Determination of Ocratoxin A by capillary HPLC with laser induced fluorescence detection
In this abstract we propose the coupling of capillary-HPLC with LIF for the analysis of OTA, using anionic micellar medium in the mobile phase, which constitutes a very efficient alternative, increasing sensitivity and selectivity. To the best of our knowledge, … Continue reading
Posted in Capillary HPLC, Chromatography, Fluorescence, LIF, Mycotoxins
Tagged HPLC
Comments Off on Determination of Ocratoxin A by capillary HPLC with laser induced fluorescence detection
On-line preconcentration for the determination of aflatoxins in rice samples by micellar electrokinetic capillary chromatography with laser induced fluorescence detection
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 CE
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Advances and analytical applications in chemiluminescence coupled to capillary electrophoresis
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 CE, CL
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