Listar por autoría "8e8dd1c6-8598-435e-bbb0-11f2082fb3d6"
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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 ... -
Effects of structural characteristics of (un)conjugated steroid metabolites in their collision cross section value
Bressan, Claudia; Celma, Alberto; Alechaga Silva, Élida; Monfort, Nuria; Ventura, Rosa; Sancho, Juan V Elsevier (2023-05-08)In this work, the collision cross section (CCS) value of 103 steroids (including unconjugated metabolites and phase II metabolites conjugated with sulfate and glucuronide groups) was determined by liquid chromatography ... -
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 ... -
Mass spectrometric behavior of anabolic androgenic steroids using gas chromatography coupled to atmospheric pressure chemical ionization source. Part I: Ionization
Raro Macián, Montserrat; Portoles, Tania; Sancho, Juan V; Pitarch, Elena; Hernandez, Felix; Marcos, Josep; Ventura, Rosa; Gómez, C.; Segura, Jordi; Pozo, Óscar J. John Wiley & Sons (2014-05)The detection of anabolic androgenic steroids (AAS) is one of the most important topics in doping control analysis. Gas chromatography coupled to (tandem) mass spectrometry (GC–MS(/MS)) with electron ionization and liquid ... -
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 characterisation of acondensation product betweenporphobilinogen and indolyl-3-acryloylglycinein urine of patients with acuteintermittent porphyria
Ibáñez, Maria; Marcos, Josep; Ventura, Rosa; Segura, Jordi; Pozo, Óscar J.; To-Figueras, Jordi Wiley (2015-07)We document the presence of a previously unknown species in the urine of patients with acute intermittent porphyria (AIP). Thecompound 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 ... -
Potential of atmospheric pressure chemical ionization source in gas chromatography tandem mass spectrometry for the screening of urinary exogenous androgenic anabolic steroids
Raro Macián, Montserrat; Portoles, Tania; Pitarch, Elena; Sancho, Juan V; Hernandez, Felix; Garrostas, L.; Marcos, Josep; Ventura, Rosa; Segura, Jordi; Pozo, Óscar J. Elsevier (2016-02-04)The atmospheric pressure chemical ionization (APCI) source for gas chromatography-mass spectrometry analysis has been evaluated for the screening of 16 exogenous androgenic anabolic steroids (AAS) in urine. The sample ... -
Untargeted Metabolomics in Doping Control: Detection of New Markers of Testosterone Misuse by Ultrahigh Performance Liquid Chromatography Coupled to High-Resolution Mass Spectrometry
Raro Macián, Montserrat; Ibáñez, Maria; Gil Solsona, Ruben; Fabregat, Andreu; Tudela, Eva; Deventer, Koen; Ventura, Rosa; Segura, Jordi; Marcos, Josep; Kotronoulas, Aristotelis; Joglar, Jesús; Farré, Magi; Yang, Sheng; Xing, Yanyi; Van Eenoo, Peter; Pitarch, Elena; Hernandez, Felix; Sancho, Juan V; Pozo, Óscar J. American Chemical Society (2015)The use of untargeted metabolomics for the discovery of markers is a promising and virtually unexplored tool in the doping control field. Hybrid quadrupole time-of- flight (QTOF) and hybrid quadrupole Orbitrap (Q ...