Listar por autoría "e919460c-c920-4a17-b3f9-f35c38aa3a53"
Mostrando ítems 1-20 de 24
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Capabilities of microbore columns coupled to inductively coupled plasma mass spectrometry in speciation of arsenic and selenium
Castillo Tirado, Ángel; Roig-Navarro, Antoni F.; Pozo, Óscar J. Elsevier (2008)The performance of microHPLC-microconcentric nebulizer-inductively coupled plasma-mass spectrometry (ICP-MS) coupling for the simultaneous determination of As(III), As(V), monomethylarsenic acid (MMA), dimethylarsinic acid ... -
Characterization of the Salinisation Processes in Aquifers Using Boron Isotopes; Application to South-Eastern Spain
Morell, Ignacio; Pulido Bosch, Antonio; Sánchez Martos, Francisco; Vallejos, Ángela; Daniele, Linda; Molina, Luis; Calaforra, José María; Roig-Navarro, Antoni F.; Renau Llorens, Elisa Alejandra Springer Netherlands (2008)Use of δ11B provides a solid tool for discriminating hydrogeochemical processes in complex coastal aquifers. Its efficiency increases markedly when it is applied along with other major or minor constituents. Nevertheless, ... -
Comparison of approaches to deal with matrix effects in LC-MS/MS based determinations of mycotoxins in food and feed
Fabregat-Cabello, Neus; Zomer, P.; Sancho, Juan V; Roig-Navarro, Antoni F.; Mol, Johannes G. J. © 2015 Wageningen Academic Publishers (2016-03)This study deals with one of the major concerns in mycotoxin determinations: the matrix effect related to LC-MS/ MS systems with electrospray ionization sources. To this end, in a first approach, the matrix effect has been ... -
Comparison of isotope pattern deconvolution and calibration curve quantification methods for the determination of estrone and 17β-estradiol in human serum
Pitarch-Motellón, Jorge; Fabregat-Cabello, Neus; Le Goff, C.; Roig-Navarro, Antoni F.; Sancho, Juan V; Cavalier, E. Elsevier (2019-04)A Liquid Chromatography coupled to tandem mass spectrometry (LC–MS/MS) based method have been developed for the determination of the main estrogen compounds –estrone (E1) and 17β-estradiol (E2)– in human serum. Two isotope ... -
Determination of selected endogenous anabolic androgenic steroids and ratios in urine by ultra high performance liquid chromatography tandem mass spectrometry and isotope pattern deconvolution
Pitarch-Motellón, Jorge; Sancho, Juan V; Ibáñez, Maria; Pozo, Óscar J.; Roig-Navarro, Antoni F. Elsevier (2017-09)An isotope dilution mass spectrometry (IDMS) method for the determination of selected endogenous anabolic androgenic steroids (EAAS) in urine by UHPLC–MS/MS has been developed using the isotope pattern deconvolution (IPD) ... -
Development and validation of a liquid chromatography isotope dilution mass spectrometry method for the reliable quantificationof alkylphenols in environmental water samples by isotopepattern deconvolution
Fabregat-Cabello, Neus; Sancho, Juan V; Vidal-Albalat, Andreu; González, Florenci; Roig-Navarro, Antoni F. Copyright © 2015 Elsevier (2014-02-07)We present here a new measurement method for the rapid extraction and accurate quantification of technical nonylphenol (NP) and 4-t-octylphenol (OP) in complex matrix water samples by UHPLC-ESI-MS/MS. The extraction of ... -
Digital video electrochemistry (DVEC) applied to the study of Prussian Blue films
García-Jareño, José J.; Agrisuelas, Jerónimo; Roig-Navarro, Antoni F.; Vicente, Francisco Wiley (2022-03-02)Prussian Blue films were electrogenerated on a Pt disc electrode and color changes were studied by digital video electrochemistry together with cyclic voltammetry. Three systems of peaks were detected. Peaks corresponding ... -
Efecto de la fenformina sobre la corrosión electroquímica del hierro
Roig-Navarro, Antoni F.; Olcina, P.; Vicente, F. Instituto Español de Corrosión y Protección (1991)Voltammetry provides quick information about the evolution of the iron electrodes subjected to different chemical treatments. Temporarily the dichromate protects it in acid medium whereas the protective action of the ... -
Electrochemical oxidation of dibenzothiophene compounds on BDD electrode in acetonitrile–water medium
Ornelas Dávila, Omar; Lacalle-Bergeron, Leticia; Ruiz Gutiérrez, P.; Dávila-Jiménez, Martín M.; Sirés Sadornil, Ignacio; Brillas, Enric; Roig-Navarro, Antoni F.; Beltran Arandes, Joaquin; Sancho, Juan V Elsevier (2019-05-23)The electrochemical oxidation of dibenzothiophene and two derivatives, namely 4-methyldibenzothiophene and 4,6-dimethyldibenzothiophene, was investigated either separately or as a mixture, on a BDD anode in a miscible ... -
Electrochemical oxidation of meglumine in a pharmaceutical formulation using a nanocomposite anode
Lozano Gutiérrez, G. I.; Ornelas Dávila, Omar; López Aguilar, C.; Dávila-Jiménez, Martín M.; Silva-González, Rutilo; Sirés Sadornil, Ignacio; Fabregat-Safont, David; Roig-Navarro, Antoni F.; Beltran Arandes, Joaquin; Sancho Llopis, Juan Vicente Elsevier (2022-10-30)The electrocatalytic oxidation of meglumine and gadoterate meglumine (Gd-DOTA) on a TiO2-Ni(SO4)0.3(OH)1.4 composite anode was investigated in alkaline medium (5 M KOH) using cyclic voltammetry and chronoamperometry. The ... -
Electrochromic behavior of Prussian Yellow
Agrisuelas, Jerónimo; Delgado, C.; García-Jareño, J.J.; Moreno-Guerrero, C.; Roig-Navarro, Antoni F.; Vicente, F. Electrochemical Society (2013)Prussian Blue films were studied by in situ electrogravimetric and spectroelectrochemical methods during the electrochemical oxidation to the Prussian Yellow form. Spectroelectrochemical studies detected important ... -
Evaluation of uncertainty sources in the determination of testosterone in urine by calibration-based and isotope dilution quantification using ultra high performance liquid chromatography tandem mass spectrometry
Pitarch-Motellón, Jorge; Roig-Navarro, Antoni F.; Sancho, Juan V; Ibáñez, Maria; Fabregat-Cabello, Neus; Pozo, Óscar J.; Ventura, Rosa; García Alonso, J. Ignacio; Rodríguez González, Pablo; González Gago, Adriana; Ereño Artabe, Amaia; Van Eenoo, Peter; Deventer, Koen; Dehnes, Yvette; Rzeppa, Sebastian Elsevier (2017-06)Three quantification methodologies, namely calibration with internal standard (Cal-IS, non-weighted), weighted calibration with internal standard (wCal-IS) and isotope pattern deconvolution (IPD) have been used for the ... -
Fast and Accurate Procedure for the Determination of Cr(VI) in Solid Samples by Isotope Dilution Mass Spectrometry
Fabregat-Cabello, Neus; Rodríguez González, Pablo; Castillo Tirado, Ángel; Malherbe, Julien; Roig-Navarro, Antoni F.; Long, Stephen E.; García Alonso, J. Ignacio American Chemical Society (2012)We present here a new environmental measurement method for the rapid extraction and accurate quantification of Cr(VI) in solid samples. The quantitative extraction of Cr(VI) is achieved in 10 minutes by means of focused ... -
Fast methodology for the reliable determination of nonylphenol in water samples by minimal labeling isotope dilution mass spectrometry
Fabregat-Cabello, Neus; Castillo Tirado, Ángel; Sancho, Juan V; González, Florenci; Roig-Navarro, Antoni F. Elsevier (2013-08)In this work we have developed and validated an accurate and fast methodology for the determination of 4-nonylphenol (technical mixture) in complex matrix water samples by UHPLC–ESI-MS/MS. The procedure is based on isotope ... -
Identification of electroactive sites in Prussian Yellow films
Agrisuelas, Jerónimo; García-Jareño, J.J.; Moreno-Guerrero, C.; Roig-Navarro, Antoni F.; Vicente, F. Elsevier (2013)Prussian Blue films were electrogenerated on the surface of the transparent ITO electrodes. The electrochemical oxidation to the Prussian Yellow form was investigated by means of in situ voltammetry and vis–NIR spectroscopic ... -
Interfacial role of Cesium in Prussian Blue Films
Catalán, R.; Agrisuelas, Jerónimo; Cuenca, A.; García-Jareño, J.J.; Roig-Navarro, Antoni F.; Vicente, F. ECS (2015)The simultaneous measurement of current, mass, motional resistance and absorbance magnitudes allows the electrochemical cation insertion process to be explained during successive voltammograms around the Prussian Blue ⇄ ... -
Isotope Dilution LC-ESI-MS/MS and low resolution Selected Reaction Monitoring as a tool for the accurate quantification of urinary testosterone
Ereño Artabe, Amaia; Gonzalez-Gago, Adriana; Suarez Fernández, Amanda; Pitarch-Motellón, Jorge; Roig-Navarro, Antoni F.; Pozo, Óscar J.; Rodríguez González, Pablo; García Alonso, J. Ignacio Elsevier (2018-09)A new analytical method for the quantification of testosterone in human urine samples by isotope dilution mass spectrometry is proposed. A standard solution of 13C2-testosterone is added to the samples at the beginning of ... -
Isotope pattern deconvolution-tandem mass spectrometry for the determination and confirmation of diclofenac in wastewaters
Castillo Tirado, Ángel; GRACIA LOR, EMMA; Roig-Navarro, Antoni F.; Sancho, Juan V; Rodríguez González, Pablo; García Alonso, J. Ignacio Elsevier (2013-02-26)Isotope dilution mass spectrometry (IDMS) based on isotope pattern deconvolution (IPD) has been applied here to MS/MS (QqQ) in order to carry out the quantification and confirmation of organic compounds in complex matrix ... -
Method development and validation for the determination of selected endocrine disrupting compounds by liquid chromatography mass spectrometry and isotope pattern deconvolution in water samples. Comparison of two extraction techniques
Fabregat-Cabello, Neus; Pitarch-Motellón, Jorge; Sancho, Juan V; Ibáñez, Maria; Roig-Navarro, Antoni F. Royal Society of Chemistry (2016)In the present work two different extraction methodologies have been developed and validated for the determination of t-octylphenol and a technical mixture of nonylphenol (both, priority substances of EU water policy) and ... -
Multiple Spiking Species-Specific Isotope Dilution Analysis by Molecular Mass Spectrometry: Simultaneous Determination of Inorganic Mercury and Methylmercury in Fish Tissues
Castillo Tirado, Ángel; Rodríguez González, Pablo; Centineo, Giuseppe; Roig-Navarro, Antoni F.; García Alonso, J. Ignacio American Chemical Society (2010)This work demonstrates, for the first time, the applicability of multiple spiking isotope dilution analysis to molecular mass spectrometry exemplified by the speciation analysis of mercury using GC(EI)MS instrumentation. ...