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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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Category Archives: Sample treatment
Analysis of cephalosporin residues in environmental waters by capillary zone electrophoresis with off-line and on-line preconcentration
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 CE
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
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
Convenient solid phase extraction of cephalosporins in milk using a molecularly imprinted polymer
In this paper, a molecularly imprinted polymer (MIP) for cephalosporin molecules (cephalexin (CFL) and cephapirin (CFP)), was prepared by non covalent molecular imprinting approach and applied to solid phase extraction (SPE). For MIP synthesis, a tributylammonium cefadroxil salt (TBA–CFD) was … Continue reading
Posted in Cephalosporins, MIPs, Milk
Tagged HPLC
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Determination of ochratoxin A in wines by capillary liquid chromatography with laser induced fluorescence detection using dispersive liquid–liquid microextraction
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 HPLC
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
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 CE
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
Determination of quinolones of veterinary use in bee products by ultra-high performance liquid chromatography–tandem mass spectrometry using a QuEChERS extraction procedure
A reliable and rapid ultra high performance liquid chromatography tandem mass spectrometry (UHPLC–MS/MS) method has been developed for the determination of the eight quinolones of veterinary use regulated by European Union (marbofloxacin, ciprofloxacin, danofloxacin, enrofloxacin, sarafloxacin, difloxacin, flumequine and oxolinic … Continue reading
Posted in Honey, Mass spectrometry, Propolis, QuEChERS, Quinolones, Royal jelly, UHPLC
Comments Off on Determination of quinolones of veterinary use in bee products by ultra-high performance liquid chromatography–tandem mass spectrometry using a QuEChERS extraction procedure
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
Comments Off on Determination of carbamates at trace levels in water and cucumber by capillary liquid chromatography
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
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
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
Comments Off on Evaluación de la microextracción líquido-líquido dispersiva para la determinación de patulina en zumos de manzana mediante electroforesis capilar
