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118 Newest Publications about the topic quadrupole mass spectrometers


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Competing fragmentation processes of β‐substituted propanoate ions upon collision induced dissociation

01-Aug-2016 | Luc M. LeBlanc, Sean W. Powers, J. Stuart Grossert, Robert L. White, Rapid Communications in Mass Spectrometry, 2016

Rationale When subjected to collisional activation, gas‐phase carboxylate ions typically undergo decarboxylation. However, alternative fragmentation processes dominate when the carboxylate group is located within certain structural motifs. In this work, the fragmentation processes of ...


Phenyl group participation in rearrangements during collision‐induced dissociation of deprotonated phenoxyacetic acid

29-Oct-2015 | Luc M. LeBlanc, Andrew M. J. Crowell, J. Stuart Grossert, Robert L. White, Rapid Communications in Mass Spectrometry, 2015

Rationale The identification of trace constituents in biological and environmental samples is frequently based on the fragmentation patterns resulting from the collision‐induced dissociation (CID) of gas‐phase ions. Credible mechanistic characterization of fragmentation processes, including ...


Ultra performance liquid chromatography – mass spectrometry studies of formalin‐induced alterations of human brain lipidome

30-Sep-2014 | Mathieu Gaudin, Maï Panchal, Sophie Ayciriex, Erwan Werner, Alain Brunelle, David Touboul, Claire Boursier‐Neyret, N ..., Journal of Mass Spectrometry, 2014

The development of ‘omics’ sciences offers new opportunities for the study of neurodegenerative diseases but increases at the same time the sample demand on brain banks that collect and store valuable human post‐mortem tissue. Our study aims to evaluate in lipidomics the potential of ...


Nontargeted Profiling of Coenzyme A thioesters in biological samples by tandem mass spectrometry

14-Aug-2013 | Michael Zimmermann; Verena Thormann; Uwe Sauer; Nicola Zamboni, Analytical Chemistry, 2013

Coenzyme A (CoA) thioesters are ubiquitously present in metabolic networks and play a pivotal role in enzymatic formation and cleavage of carbon–carbon bonds. We present a method allowing nontargeted profiling of CoA-thioesters in biological samples. The reported UHPLC-MS/MS approach employes ...


Elucidation of the volatile composition of Marsala wines by using comprehensive two-dimensional gas chromatography

12-Aug-2013 | Author(s): Giacomo Dugo , Flavio A. Franchina , Maria R. Scandinaro , Ivana Bonaccorsi , Nicola Cicero , Peter ..., Food Chemistry, 2013

Publication date: 1 January 2014 Source:Food Chemistry, Volume 142 Author(s): Giacomo Dugo , Flavio A. Franchina , Maria R. Scandinaro , Ivana Bonaccorsi , Nicola Cicero , Peter Q. Tranchida , Luigi Mondello The present contribution describes a research work focused on the ...


Simultaneous Analysis of Noble Gases, Sulfur Hexafluoride, and Other Dissolved Gases in Water

18-Jul-2013 | Matthias S. Brennwald; Markus Hofer; Rolf Kipfer, Environmental Science & Technology, 2013

We developed an analytical method for the simultaneous measurement of dissolved He, Ne, Ar, Kr, Xe, SF6, N2, and O2 concentrations in a single water sample. The gases are extracted from the water using a head space technique and are transferred into a vacuum system for purification and separation ...


Advances in On-line Absolute Trace Gas Analysis by SIFT-MS

17-Jul-2013 | Spanel, Patrik; Smith, David, Current Analytical Chemistry, 2013

Abstract: The basic physics and ion chemistry involved in the application of selected ion flow tube mass spectrometry, SIFT-MS, to accurate quantification of concentrations of trace gases in air and breath is now well understood. Algorithms, documented in previously published literature ...


Selected reaction monitoring method to determine the species origin of blood-based binding agents in meats: A collaborative study

15-Jul-2013 | Author(s): H.H. Grundy , W.A. Read , R. Macarthur , M. Dickinson , A.J. Charlton , M. Dušek , A. Breidbach , ..., Food Chemistry, 2013

Publication date: 15 December 2013 Source:Food Chemistry, Volume 141, Issue 4 Author(s): H.H. Grundy , W.A. Read , R. Macarthur , M. Dickinson , A.J. Charlton , M. Dušek , A. Breidbach , P.F. Scholl , G.A. Newsome , D. Bell , M. Alewijn Binding products or food ‘glues’ are used ...


Sugar nucleotide quantification using multiple reaction monitoring liquid chromatography/tandem mass spectrometry

26-Jun-2013 | Aldo D. Garcia, Jorge L. Chavez, Yehia Mechref, Rapid Communications in Mass Spectrometry, 2013

RATIONALE Glycosylation of proteins and lipids is reliant on the availability of monosaccharide‐activated donors known as sugar nucleotides. They are responsible for glycosylation in cells. Reliable quantification of these sugar nucleotides might provide an insight into their biological roles ...


Fully automated, high‐precision instrumentation for the isotopic analysis of tropospheric N2O using continuous flow isotope ratio mass spectrometry

20-Jun-2013 | Katherine E. Potter, Shuhei Ono, Ronald G. Prinn, Rapid Communications in Mass Spectrometry, 2013

RATIONALE Measurements of the isotopic composition of nitrous oxide in the troposphere have the potential to bring new information about the uncertain N2O budget, which mole fraction data alone have not been able to resolve. Characterizing the expected subtle variations in tropospheric N2O ...


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