Listar por tema "Mass spectrometry"
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Analytical study on ethephon residue determination in water by ion-pairing liquid chromatography/tandem mass spectrometry
Taylor & Francis (2011-11-22)A detailed analytical study on ethephon residue determination in water, making use of ion-pairing liquid chromatography coupled to electrospray tandem mass spectrometry (LC/MS/MS), has been carried out. Ethephon is a plant ... -
Application of advanced mass spectrometric techniques for the identification, metabolic characterisation and toxicological analysis of new psychoactive substances
Universitat Jaume I (2020-11-27)This Doctoral Thesis presents an in-depth investigation on NPS from the analytical chemistry point of view, being structured in three blocks. The first is focused on the analytical characterisation of different compounds, ... -
Building an empirical mass spectra library for screening of organic pollutants by ultra-high-pressure liquid chromatography/hybrid quadrupole time-of-flight mass spectrometry
John Wiley (2011-01-30)Hybrid quadrupole time-of-flight mass spectrometry (QTOF MS) has gained wide acceptance in many fields of chemistry, for example, proteomics, metabolomics and small molecule analysis. This has been due to the numerous ... -
Characterization of the organic contamination pattern of a hyper-saline ecosystem by rapid screening using gas chromatography coupled to high-resolution time-of-flight mass spectrometry
Elsevier (2012-09)In this paper, gas chromatography coupled to high-resolution time-of-flight mass spectrometry (GC–TOF MS) has been applied to evaluate organic pollution in a hyper-saline aquatic environment. Firstly, a target screening ... -
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
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 anabolic steroids in doping analysis by LC-MS
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 ... -
Determination of 17b-estradiol and 17a-ethinylestradiol in water at sub-ppt levels by liquid chromatography coupled to tandem mass spectrometry
Royal Society of Chemistry (2014-06)Steroid estrogens are a group of endocrine disrupting compounds (EDCs) excreted in human urine mainly as glucuronide or sulfate conjugates, which might be converted back into the free estrogens in water. The natural estrogen ... -
Determination of sub-ppb epichlorohydrin levels in water by on-line solid-phase extraction liquid chromatography/tandem mass spectrometry
John Wiley (2009-06)A new sensitive and selective method based on on-line solid-phase extraction (SPE) coupled to liquid chromatography/electrospray ionization tandem mass spectrometry (LC/ESI-MS/MS) using a triple quadrupole mass spectrometer ... -
Development and validation of ultra high performance-liquid chromatography–tandem mass spectrometry based methods for the determination of neonicotinoid insecticides in honey
Elsevier (2018-06-05)In this study, the feasibility of two sample treatments has been evaluated for the determination of seven neonicotinoid insecticides in honey from different botanical origins using ultra-high performance liquid chromatography ... -
Direct quantification of steroid glucuronides in human urine by liquid chromatography-electrospray tandem mass spectrometry
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 ... -
Exploring the Potential of a Global Emerging Contaminant Early Warning Network through the Use of Retrospective Suspect Screening with High-Resolution Mass Spectrometry
ACS (2018-04-04)A key challenge in the environmental and exposure sciences is to establish experimental evidence of the role of chemical exposure in human and environmental systems. High resolution and accurate tandem mass spectrometry ... -
Gas chromatography coupled to high-resolution time-of-flight mass spectrometry to analyze trace-level organic compounds in the environment, food safety and toxicology
Elsevier (2011)Gas chromatography coupled to high-resolution time-of flight mass spectrometry (GC-HR-TOF-MS) is a powerful analytical technique with excellent capabilities due to its high sensitivity in full-spectrum-acquisition mode ... -
Gas chromatography-mass spectrometric determination of polybrominated diphenyl ethers in complex fatty matrices from aquaculture activities
Elsevier (2010)Gas chromatography coupled to mass spectrometry in negative chemical ionization mode (GC-(NCI)MS) has been applied to the quantification and reliable identification of polybrominated diphenyl ethers (PBDEs) in animal and ... -
Investigation of pesticide metabolites in food and water by LC-TOF-MS
Elsevier (2008)We illustrate the potential of liquid chromatography with (quadrupole) time-of-flight mass spectrometry [LC-(Q)TOF-MS] in investigating the presence of pesticide metabolites in food and water samples. The higher polarity ... -
Mass spectrometric strategies for the investigation of biomarkers of illicit drug use in wastewater
Wiley (2018)The analysis of illicit drugs in urban wastewater is the basis of wastewater‐based epidemiology (WBE), and has received much scientific attention because the concentrations measured can be used as a new non‐intrusive tool ... -
Metabolomic approaches for olive oil quality discrimination by gas chromatography coupled to mass spectrometry
Universitat Jaume I (2016-06-24)In this work, a gas chromatography coupled to mass spectrometry (GC-EI-Q(MS)) has been used for markers identification for a metabolomics approach. It has been carried out in order to create a statistical model to perform ... -
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
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 ... -
Multiclass determination of 66 organic micropollutants in environmental water samples by fast gas chromatography–mass spectrometry
Springer (2012-03)A multiresidue method has been developed for quantification and identification of 66 multiclass priority organic pollutants in water by fast gas chromatography (GC) coupled to mass spectrometry (MS). Capabilities and ... -
No transfer of the non-regulated mycotoxins, beauvericin and enniatins, from feeds to farmed fish reared on plant-based diets
Elsevier (2020-09-01)Concern about the risk of exposure to emerging plant-derived mycotoxins such as beauvericin and enniatins has been addressed by the European Commission who requested the European Food Safety Authority for a scientific ... -
Non-target screening of organic contaminants in marine salts by gas chromatography coupled to high-resolution time-of-flight mass spectrometry
Elsevier (2011-08-15)Gas chromatography coupled to time-of-flight mass spectrometry (GC–TOF MS) has been applied to characterize the organic pollution pattern of marine salt samples collected in saltworks from the Spanish Mediterranean coast. ...