Browsing QFA_Articles by Author "12230843-9d8f-4b45-a692-d9e50c3c9630"
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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 ... -
Comparison between triple quadrupole, time of flight and hybrid quadrupole time of flight analysers coupled to liquid chromatography for the detection of anabolic steroids in doping control analysis
Pozo, Óscar J.; Van Eenoo, Peter; Deventer, Koen; Elbardissy, Hisham; Grimalt Brea, Susana; Sancho, Juan V; Hernandez, Felix; Ventura, Rosa; Delbeke, Frans T. Elsevier (2011-01-17)Triple quadrupole (QqQ), time of flight (TOF) and quadrupole-time of flight (QTOF) analysers have been compared for the detection of anabolic steroids in human urine. Ten anabolic steroids were selected as model compounds ... -
Detection and Characterization of a New Metabolite of 17α-Methyltestosterone
Pozo, Óscar J.; Van Eenoo, Peter; Deventer, Koen; Lootens, Leens; Van Thuyne, Wim; Parr, Maria K.; Schänzer, Wilhelm; Sancho, Juan V; Hernandez, Felix; Meuleman, Philip; Leroux-Roels, Geert; Delbeke, Frans T. The American Society for Pharmacology and Experimental Therapeutics (2009-11)The misuse of the anabolic steroid methyltestosterone is currently routinely monitored in doping control laboratories by gas chromatography-mass spectrometry (GC-MS) of two of its metabolites: 17α-methyl-5β-androstane-3α,17β-diol ... -
Detection and characterization of anabolic steroids in doping analysis by LC-MS
Pozo, Óscar J.; Van Eenoo, Peter; Deventer, Koen; Delbeke, Frans T. Elsevier (2008)The detection of target anabolic steroids in doping analysis has generally been performed by gas chromatography combined with mass spectrometry (GC-MS). However, liquid chromatography combined with tandem mass spectrometry ... -
Detection and structural investigation of metabolites of stanozolol in human urine by liquid chromatography tandem mass spectrometry
Pozo, Óscar J.; Van Eenoo, Peter; Deventer, Koen; Lootens, Leens; Grimalt Brea, Susana; Sancho, Juan V; Hernandez, Felix; Meuleman, Philip; Leroux-Roels, Geert; Delbeke, Frans T. Elsevier (2009)The applicability of LC-MS/MS in precursor ion scan mode for the detection of urinary stanozolol metabolites has been studied. The product ion at m/z 81 has been selected as specific for stanozolol metabolites without a ... -
Direct quantification of steroid glucuronides in human urine by liquid chromatography-electrospray tandem mass spectrometry
Pozo, Óscar J.; Van Eenoo, Peter; Van Thuyne, Wim; Deventer, Koen; Delbeke, Frans T. Elsevier (2008)A method based on liquid chromatography-tandem mass spectrometry (LC-MS/MS) for the direct quantification of glucuronides of testosterone (TG), epitestosterone (EPG), androsterone (AG) and etiocholanolone (ETG) has been ... -
Investigating the presence of pesticide transformation products in water by using liquid chromatography-mass spectrometry with different mass analyzers
Hernandez, Felix; Ibáñez, Maria; Pozo, Óscar J.; Sancho, Juan V John Wiley & Sons (2008)Many pesticide transformation products (TPs) can reach environmental waters as a consequence of their normally having a higher polarity than their parent pesticides. This makes the development of analytical methodology ... -
Mass spectrometric characterisation of a condensation product between porphobilinogen and indolyl-3-acryloylglycine in urine of patients with acute intermittent porphyria
Marcos, Josep; Ibáñez, Maria; Ventura, Rosa; Segura, Jordi; To-Figueras, Jordi; Pozo, Oscar J. Wiley (2015-07)We document the presence of a previously unknown species in the urine of patients with acute intermittent porphyria (AIP). The compound was fully characterised by liquid chromatography tandem mass spectrometry. Interpretation ... -
Mass spectrometric characterization of urinary toremifene metabolites for doping control analyses.
Hernandez, Felix; Díaz San Pedro, Ramón; Sancho, Juan V; Gómez, C.; Pozo, Óscar J.; Vilaroca, Enrique; Salvador, Jhon P; Marco, M. P.; Segura, Jordi; Ventura, Rosa © 2011 Elsevier (2011-07)Toremifene is a selective estrogen receptor modulator included in the list of prohibited substances in sport by the World Anti-doping Agency. The aim of the present study was to investigate toremifene metabolism in humans ... -
Pesticide residues and transformation products in groundwater from a Spanish agricultural region on the Mediterranean Coast
Hernandez, Felix; Marín Ramos, José Manuel; Pozo, Óscar J.; Sancho, Juan V; Lopez, Francisco; Morell, Ignacio Taylor & Francis (2008)An overview is given on the presence and changes over time of pesticide residues in groundwater from the Valencia region, one of the most important citrus cultivation sites of southern Europe. A multiresidue LC-MS/MS ... -
Use of quadrupole time-of-flight mass spectrometry to determine proposed structures of transformation products of the herbicide bromacil after water chlorination
Ibáñez, Maria; Sancho, Juan V; Pozo, Óscar J.; Hernandez, Felix John Wiley (2011)The herbicide bromacil has been extensively used in the Spanish Mediterranean region, and although plant protection products containing bromacil have been withdrawn by the European Union, this compound is still frequently ... -
Use of ultra-high-pressure liquid chromatography–quadrupole time-of-flight MS to discover the presence of pesticide metabolites in food samples
Hernandez, Felix; Grimalt Brea, Susana; Pozo, Óscar J.; Sancho, Juan V Wiley (2009)In this paper we illustrate the use of two different methodologies to investigate the presence of pesticide metabolites in parent pesticide-positive food samples, using ultra-high-pressure liquid chromatography coupled to ...