Category Archives: MEKC

Sweeping-micellar electrokinetic chromatography with tandem mass spectrometry as an alternative methodology to determine neonicotinoid and boscalid residues in pollen and honeybee samples.

Posted on 19 April, 2022 by fqm302

In this work, it is proposed for the first time an electrophoretic approach based on micellar electrokinetic chromatography coupled with tandem mass spectrometry (MEKC-MS/MS) for the simultaneous determination of nine neonicotinoids (NNIs) together with the fungicide boscalid in pollen and … Continue reading →

Posted in B-AGR-202-UGR20, EQC2018-004453-P, Honeybees, Insects, MEKC, Mass spectrometry, Neonicotinoids, Pesticides, Pollen, QuEChERS, RED2018-102522-T, RTI2018-097043-B-I00, Sweeping | Tagged , , , | Comments Off on Sweeping-micellar electrokinetic chromatography with tandem mass spectrometry as an alternative methodology to determine neonicotinoid and boscalid residues in pollen and honeybee samples.

Micellar electrokinetic chromatography as efficient alternative for the multiresidue determination of seven neonicotinoids and 6-chloronicotinic acid in environmental samples

Posted on 27 August, 2020 by fqm302

A simple, sensitive, and efficient method has been developed for the determination of the seven neonicotinoid insecticides commercially available (imidacloprid, thiacloprid, clothianidin, thiamethoxam, acetamiprid, nitenpyram, and dinotefuran) and the main metabolite 6-chloronicotinic acid. Micellar electrokinetic chromatography (MEKC) mode was applied, … Continue reading →

Posted in AGL2015-70708-R, MEKC, Neonicotinoids, SPE, Soil, Solid-liquid extraction, UV-vis, Water | Tagged , , | Comments Off on Micellar electrokinetic chromatography as efficient alternative for the multiresidue determination of seven neonicotinoids and 6-chloronicotinic acid in environmental samples

A first approach using micellar electrokinetic capillary chromatography for the determination of fipronil and fipronil‐sulfone in eggs

Posted on 13 February, 2020 by fqm302

Fipronil is an insecticide that is not approved in the European Union in food. In 2017, fipronil was involved in a European health alert due to its presence in fresh hen eggs because of an illicit use in poultry farms, … Continue reading →

Posted in AGL2015-70708-R, Eggs, Fipronil, MEKC, Pesticides, SALLE, UV-vis | Tagged , , | Comments Off on A first approach using micellar electrokinetic capillary chromatography for the determination of fipronil and fipronil‐sulfone in eggs

Fully compatible and ultra-sensitive micellar electrokinetic chromatography-tandem mass spectrometry using sheathless porous-tip interfacing.

Posted on 27 October, 2017 by fqm302

The on-line coupling of micellar electrokinetic chromatography and mass spectrometry (MEKC-MS) is often hampered by incompatibility problems leading to reduced separation performance and unfavorable limits of detection (LODs). Here we propose a new selective and highly sensitive MEKC-MS/MS method employing … Continue reading →

Posted in Carbamates, MEKC, Mass spectrometry, Water | Tagged , | Comments Off on Fully compatible and ultra-sensitive micellar electrokinetic chromatography-tandem mass spectrometry using sheathless porous-tip interfacing.

Coupling sweeping-micellar electrokinetic chromatography with tandem mass spectrometry for the therapeutic monitoring of benzimidazoles in animal urine by dilute and shoot.

Posted on 2 August, 2017 by fqm302

A new method based on micellar electrokinetic chromatography-tandem mass spectrometry (MEKC-MS/MS) has been developed for the identification and simultaneous quantification of thirteen benzimidazoles in animal urine. In order to obtain an appropriate separation with the highest sensitivity, different electrophoretic parameters … Continue reading →

Posted in Anthelmintic, Benzimidazoles, Biological fluids, Dilute and shoot, Electrophoresis, MEKC, Mass spectrometry, P12-AGR-1647, Sweeping, Urine | Tagged , , | Comments Off on Coupling sweeping-micellar electrokinetic chromatography with tandem mass spectrometry for the therapeutic monitoring of benzimidazoles in animal urine by dilute and shoot.

Capillary electrophoresis-tandem mass spectrometry combined with molecularly imprinted solid phase extraction as useful tool for the monitoring of 5-nitroimidazoles and their metabolites in urine samples

Posted on 24 November, 2016 by fqm302

A novel capillary electrophoresis-tandem mass spectrometry approach is proposed for the determination of eleven 5-nitroimidazoles in urine samples for therapeutical drug monitoring purposes. A comparison between two separation modes, namely micellar electrokinetic chromatography and capillary zone electrophoresis was carried out, … Continue reading →

Posted in 5-nitroimidazoles, CZE, MEKC, MIPs, Mass spectrometry, P12-AGR-1647, Urine | Comments Off on Capillary electrophoresis-tandem mass spectrometry combined with molecularly imprinted solid phase extraction as useful tool for the monitoring of 5-nitroimidazoles and their metabolites in urine samples

Evaluation of the combination of micellar electrokinetic capillary chromatography with sweeping and cation selective exhaustive injection for the determination of 5-nitroimidazoles in egg samples

Posted on 27 July, 2016 by fqm302

A methodology is presented for the sensitive determination of nitromidazole residues in egg by means of micellar electrokinetic capillary chromatography in combination with cation selective exhaustive injection and ultraviolet detection. Six compounds have been considered and the separation has been … Continue reading →

Posted in 5-nitroimidazoles, CSEI, Eggs, MEKC, P12-AGR-1647, SPE, Sweeping, UV-vis | Tagged , | Comments Off on Evaluation of the combination of micellar electrokinetic capillary chromatography with sweeping and cation selective exhaustive injection for the determination of 5-nitroimidazoles in egg samples

Green methodology based on dispersive liquid–liquid microextraction and micellar electrokinetic chromatography for 5-nitroimidazole analysis in water samples

Posted on 19 September, 2013 by fqm302

Dispersive liquid–liquid microextraction has been proposed as an extraction technique combined with micellar  electrokinetic chromatography (MEKC) for the analysis of eight 5-nitroimidazole compounds, including some metabolites, in water samples. Determination has been carried out using a diode array detector, employing … Continue reading →

Posted in 5-nitroimidazoles, DLLME, MEKC, Sweeping, UV-vis, Water | Tagged , | Comments Off on Green methodology based on dispersive liquid–liquid microextraction and micellar electrokinetic chromatography for 5-nitroimidazole analysis in water samples

Micellar electrokinetic chromatography–electrospray ionization mass spectrometry employing a volatile surfactant for the analysis of amino acids in human urine

Posted on 12 September, 2013 by fqm302

A new MEKC-ESI-MS method for the analysis of amino acids (AAs) in human urine was developed employing ammonium perfluorooctanoate (APFO) as volatile surfactant. The influence of APFO on the MS signal of AAs was evaluated by infusion experiments, which showed … Continue reading →

Posted in Amino acids, MEKC, Mass spectrometry, Urine | Tagged , | Comments Off on Micellar electrokinetic chromatography–electrospray ionization mass spectrometry employing a volatile surfactant for the analysis of amino acids in human urine

Novel solid phase extraction method for the analysis of 5-nitroimidazoles and metabolites in milk samples by capillary electrophoresis

Posted on 9 September, 2013 by fqm302

A new sample treatment has been developed for the extraction of 5-nitroimidazole (5-NDZ) drugs in milk samples previous to their determination by micellar electrokinetic chromatography (MEKC). Fat removing and protein precipitation were simultaneously carried out by the addition of trichloroacetic … Continue reading →

Posted in 5-nitroimidazoles, MEKC, Milk, SPE, Sweeping, UV-vis | Tagged , | Comments Off on Novel solid phase extraction method for the analysis of 5-nitroimidazoles and metabolites in milk samples by capillary electrophoresis