Semiquantitative analysis of isomeric oligosaccharides by negative-ion mode UV-MALDI TOF postsource decay mass spectrometry and their fragmentation mechanism study atN-acetyl hexosamine moiety

2006 ◽  
Vol 41 (4) ◽  
pp. 454-462 ◽  
Author(s):  
Tohru Yamagaki ◽  
Hiroaki Suzuki ◽  
Kazuo Tachibana
Keyword(s):  
Mass Spectrometry ◽  
Negative Ion ◽  
Fragmentation Mechanism ◽  
Semiquantitative Analysis ◽  
Mechanism Study ◽  
Postsource Decay ◽  
Maldi Tof ◽  
Negative Ion Mode

Confounding contaminants in mass spectrometric reaction monitoring

2018 ◽  
Author(s):  
Gilian T. Thomas ◽  
Landon MacGillivray ◽  
Natalie L. Dean ◽  
Rhonda L. Stoddard ◽  
Lars Yunker ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Mass Spectrometric ◽  
Negative Ion ◽  
Reaction Monitoring ◽  
Schlenk Flask ◽  
Dynamic Analyses ◽  
Rubber Septa ◽  
Negative Ion Mode ◽  
Mode A

<p>Reactions carried out in the presence of rubber septa run the risk of additives being leached out by the solvent. Normally, such species are present at low enough levels that they do not interfere with the reaction significantly. However, when studying reactions using sensitive methods such as mass spectrometry, the appearance of even trace amounts of material can confuse dynamic analyses of reactions. A wide variety of additives are present in rubber along with the polymer: antioxidants, dyes, detergent, and vulcanization agents, and these are all especially problematic in negative ion mode. A redesigned Schlenk flask for pressurized sample infusion (PSI) is presented as a means of practically eliminating the presence of contaminants during reaction analyses.</p>

Identification of carbonylated peptides by tandem mass spectrometry using a precursor ion-like scan in negative ion mode

2011 ◽  
Vol 74 (11) ◽  
pp. 2351-2359 ◽  
Author(s):  
Ravi Ch. Bollineni ◽  
Maria Fedorova ◽  
Ralf Hoffmann
Keyword(s):  
Mass Spectrometry ◽  
Tandem Mass Spectrometry ◽  
Negative Ion ◽  
Tandem Mass ◽  
Negative Ion Mode

scholarly journals Investigation of electrospray for a capillary electrophoresis–mass spectrometry interface in reverse polarity and negative ion mode

2019 ◽  
Vol 25 (1) ◽  
pp. 157-163 ◽  
Author(s):  
Morgan Stickney ◽  
Qiangwei Xia ◽  
I Jonathan Amster
Keyword(s):  
Mass Spectrometry ◽  
Electroosmotic Flow ◽  
Negative Ion ◽  
Reverse Polarity ◽  
Sheath Flow ◽  
Analytical Technique ◽  
Sheath Liquid ◽  
Electrospray Process ◽  
Negative Ionization ◽  
Negative Ion Mode

Capillary zone electrophoresis (CZE) paired with mass spectrometry (MS) is a powerful analytical technique for examining mixtures of ionic analytes such as glycosaminoglycans. This study examines the mechanics of the electrospray process for a sheath flow CZE-MS interface under reverse polarity negative ionization conditions. Liquid flow in a sheath flow nano-electrospray CZE-MS interface is driven by two mechanisms, electroosmotic flow and electrospray nebulization. The contribution of these two processes to the overall flow of solution to the electrospray tip is influenced by the surface coatings of the sheath flow emitter tip and by the solvent composition. We have investigated the application of this interface to the reverse polarity separation of glycosaminoglycans and find that the role of electroosmotic flow is far less than has been reported previously, and the electrospray process itself is the largest contributor to the flow of the sheath liquid.

scholarly journals Improved matrix coating for positive- and negative-ion-mode MALDI-TOF imaging of lipids in blood vessel tissues

2019 ◽  
Vol 411 (15) ◽  
pp. 3221-3227 ◽  
Author(s):  
Christina Meisenbichler ◽  
Christian Doppler ◽  
David Bernhard ◽  
Thomas Müller
Keyword(s):  
Blood Vessel ◽  
Negative Ion ◽  
Maldi Tof ◽  
Negative Ion Mode

Characterization of complex, heterogeneous lipid A samples using HPLC-MS/MS technique II. Structural elucidation of non-phosphorylated lipid A by negative-ion mode tandem mass spectrometry

2016 ◽  
Vol 51 (8) ◽  
pp. 615-628 ◽  
Author(s):  
Viktor Sándor ◽  
Anikó Kilár ◽  
Ferenc Kilár ◽  
Béla Kocsis ◽  
Ágnes Dörnyei
Keyword(s):  
Mass Spectrometry ◽  
Tandem Mass Spectrometry ◽  
Lipid A ◽  
Structural Elucidation ◽  
Negative Ion ◽  
Tandem Mass ◽  
Negative Ion Mode

A systematic study of carboxylic acids in negative ion mode electrospray ionisation mass spectrometry providing a structural model for ion suppression

2007 ◽  
Vol 21 (13) ◽  
pp. 2014-2018 ◽  
Author(s):  
Mike N. Clifford ◽  
Violeta Lopez ◽  
Laure Poquet ◽  
Gary Williamson ◽  
Nikolai Kuhnert
Keyword(s):  
Mass Spectrometry ◽  
Carboxylic Acids ◽  
Systematic Study ◽  
Structural Model ◽  
Negative Ion ◽  
Ion Suppression ◽  
Electrospray Ionisation ◽  
Ionisation Mass Spectrometry ◽  
Negative Ion Mode ◽  
Ionisation Mass
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