Výsledky vyhledávání - "María Esther Fernández Laespada"

Development of an environmentally friendly methodological approach to determine chlorinated hydrocarbons and chlorobenzenes in soils

Autor: Ana María Casas Ferreira, María Esther Fernández Laespada, José Luis Pérez Pavón, Bernardo Moreno Cordero

Publikováno v: Green Chemistry Letters and Reviews. 7:50-59

A modified version of the quick, easy, cheap, efficient, rugged, and safe method is proposed for the determination of chlorinated pollutants in soil samples. Measurements were collected using a programmed temperature vaporizer coupled to a gas chroma

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3c10bfc986df9c0d28b62cdab46b4a38
https://doi.org/10.1080/17518253.2014.895860

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In situ derivatization coupled to microextraction by packed sorbent and gas chromatography for the automated determination of haloacetic acids in chlorinated water

Autor: María Esther Fernández Laespada, Bernardo Moreno Cordero, Ana María Casas Ferreira, José Luis Pérez Pavón

Publikováno v: Journal of Chromatography A. 1318:35-42

A novel analytical method is reported for the determination of monochloroacetic acid, dichloroacetic acid, trichloroacetic acid, monobromoacetic acid, and dibromoacetic acid. These are the five haloacetic acids (HAAs) for which the U.S. Environmental

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::806f163a028c0b88d0f95eab183d9260
https://doi.org/10.1016/j.chroma.2013.10.009

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In situ aqueous derivatization as sample preparation technique for gas chromatographic determinations

Autor: José Luis Pérez Pavón, Bernardo Moreno Cordero, Ana María Casas Ferreira, María Esther Fernández Laespada

Publikováno v: Journal of Chromatography A. 1296:70-83

The use of derivatization reactions is a common practice in analytical laboratories. Although in many cases it is tedious and time-consuming, it does offer a good alternative for the determination of analytes not compatible to gas chromatography. Man

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bf33db6219c2a04c01c29960d0eb6577
https://doi.org/10.1016/j.chroma.2013.04.084

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Microextraction by packed sorbent for the analysis of pharmaceutical residues in environmental water samples by in situ derivatization-programmed temperature vaporizer–gas chromatography–mass spectrometry

Autor: José Luis Pérez Pavón, Bernardo Moreno Cordero, Gloria Grueiro Noche, Soledad Muniategui Lorenzo, María Esther Fernández Laespada

Publikováno v: Journal of Chromatography A. 1218:9390-9396

The present work describes the development and validation of a method for the determination of five non-steroidal anti-inflammatory drugs (NSAIDs: clofibric acid, ibuprofen, naproxen, diclofenac and ketoprofen) in water samples. The fully automated m

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::907dfb62f674224c4ea0626b2ee8239a
https://doi.org/10.1016/j.chroma.2011.10.094

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In situ aqueous derivatization and determination of non-steroidal anti-inflammatory drugs by salting-out-assisted liquid–liquid extraction and gas chromatography–mass spectrometry

Autor: Soledad Muniategui Lorenzo, Bernardo Moreno Cordero, José Luis Pérez Pavón, María Esther Fernández Laespada, Gloria Grueiro Noche

Publikováno v: Journal of Chromatography A. 1218:6240-6247

A new analytical method for the determination of trace levels of five non-steroidal anti-inflammatory drugs (NSAIDs: clofibric acid, ibuprofen, naproxen, diclofenac and ketoprofen) in water samples is described. The analytical procedure involves in s

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1497144223e4d45b7b0a7f5de5750abb
https://doi.org/10.1016/j.chroma.2011.06.112

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In situ derivatization reaction and determination of ibuprofen in water samples using headspace generation-programmed temperature vaporization-gas chromatography-mass spectrometry

Autor: María Esther Fernández Laespada, Ana María Casas Ferreira, Bernardo Moreno Cordero, José Luis Pérez Pavón

Publikováno v: Journal of Chromatography A. 1216:6728-6734

The aim of the present work is to propose a method for the determination of ibuprofen, as a typical representative of pharmaceutical compounds, in aqueous samples. To do so, an in situ derivatization reaction in aqueous medium was employed in the via

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f320b423e805d66997beb33f32ad55a0
https://doi.org/10.1016/j.chroma.2009.08.011

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Comparative study of silicone and microporous membranes for the separation of some phenols prior to high performance liquid chromatography analysis

Autor: Bernardo Moreno Cordero, José Luis Pérez Pavón, María Esther Fernández Laespada, Lorenzo Calvo Seronero, Carmelo García Pinto

Publikováno v: Journal of Separation Science. 24:526-532

A membrane separation module has been coupled on-line to a high-resolution liquid chromatographic system. A microcomputer controls the set of operations required in the overall automatic process. Two types of membranes, homogeneous (silicone) and mic

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::79459e78a2f8c9320e3335a598c3d566
https://doi.org/10.1002/1615-9314(20010801)24:7<526::aid-jssc526>3.0.co

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Determination of chlorobenzenes in water samples based on fully automated microextraction by packed sorbent coupled with programmed temperature vaporization-gas chromatography-mass spectrometry

Autor: Bernardo Moreno Cordero, Gloria Grueiro Noche, María Esther Fernández Laespada, José Luis Pérez Pavón, Soledad Muniategui Lorenzo

Publikováno v: Analytical and bioanalytical chemistry. 405(21)

A fully automated method consisting of microextraction by packed sorbent (MEPS) coupled directly to programmed temperature vaporizer-gas chromatography-mass spectrometry (PTV-GC-MS) has been developed to determine the 12 chlorobenzene congeners (chlo

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7bcde933ac37f8ce024b1eefcd0aee69
https://pubmed.ncbi.nlm.nih.gov/23780226

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Headspace sampling with in situ carbodiimide-mediated derivatization for the determination of ibuprofen in water samples

Autor: Ana María Casas Ferreira, Bernardo Moreno Cordero, María Esther Fernández Laespada, José Luis Pérez Pavón

Publikováno v: Journal of chromatography. A. 1218(30)

A method using headspace generation and in situ derivatization with water soluble EDC (1-[3-(dimethylamino)propyl]-3-ethylcarbodiimide) and TFEA (2,2,2-trifluoroethylamine) has been optimized for the determination of ibuprofen (2-(p-isobutylphenyl)pr

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ead3a39d2f899c49f2338d5c705ffc60
https://pubmed.ncbi.nlm.nih.gov/21402380

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GC-MS determination of parabens, triclosan and methyl triclosan in water by in situ derivatisation and stir-bar sorptive extraction

Autor: Monika Möder, Ana María Casas Ferreira, María Esther Fernández Laespada

Publikováno v: Analytical and bioanalytical chemistry. 399(2)

Stir-bar sorptive extraction in combination with an in situ derivatisation reaction and thermal desorption–gas chromatography–mass spectrometry was successfully applied to determine parabens (methylparaben, isopropylparaben, n-propylparaben, buty

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8fc6a6114ed0a604d83bccc44fd1cd45
https://pubmed.ncbi.nlm.nih.gov/21046080

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