scholarly journals Sequential Ion-Ion Reactions for Enhanced Gas-Phase Sequencing of Large Intact Proteins in a Tribrid Orbitrap Mass Spectrometer

2021 ◽  
Author(s):  
Jake Kline ◽  
Christopher Mullen ◽  
Kenneth Durbin ◽  
Ryan Oates ◽  
Romain Huguet ◽  
...  
Keyword(s):  
Proton Transfer ◽  
Gas Phase ◽  
Mass Spectrometer ◽  
Charge Reduction ◽  
Sequence Coverage ◽  
Intact Proteins ◽  
Orbitrap Mass Spectrometer

We are submitting a manuscript describing the application of proton transfer charge reduction to increase the sequence coverage for proteins > 30 kDa using Orbitrap FTMS.

scholarly journals Sequential Ion-Ion Reactions for Enhanced Gas-Phase Sequencing of Large Intact Proteins in a Tribrid Orbitrap Mass Spectrometer

2021 ◽  
Author(s):  
Jake Kline ◽  
Christopher Mullen ◽  
Kenneth Durbin ◽  
Ryan Oates ◽  
Romain Huguet ◽  
...  
Keyword(s):  
Proton Transfer ◽  
Gas Phase ◽  
Mass Spectrometer ◽  
Charge Reduction ◽  
Sequence Coverage ◽  
Intact Proteins ◽  
Orbitrap Mass Spectrometer

We are submitting a manuscript describing the application of proton transfer charge reduction to increase the sequence coverage for proteins > 30 kDa using Orbitrap FTMS.

Gas-Phase Chemistry in the GC Orbitrap Mass Spectrometer

2018 ◽  
Vol 30 (4) ◽  
pp. 573-580 ◽  
Author(s):  
Tim U. H. Baumeister ◽  
Nico Ueberschaar ◽  
Georg Pohnert
Keyword(s):  
Gas Phase ◽  
Mass Spectrometer ◽  
Gas Phase Chemistry ◽  
Orbitrap Mass Spectrometer ◽  
Phase Chemistry

Ion chemistry of aluminum and boron in methane–oxygen flames

1992 ◽  
Vol 70 (3) ◽  
pp. 839-848 ◽  
Author(s):  
Pierre N. Crovisier ◽  
J. Hugh Horton ◽  
Carl S. Hassanali ◽  
John M. Goodings
Keyword(s):  
Transition Metals ◽  
Proton Transfer ◽  
Gas Phase ◽  
Oxidation State ◽  
Mass Spectrometer ◽  
Atmospheric Pressure ◽  
Concentration Level ◽  
Ion Chemistry ◽  
Low Concentration ◽  
Boron Ions

The ion chemistry of aluminum and boron, primarily in the +3 oxidation state, was studied by doping premixed, methane–oxygen flames of both fuel-rich and fuel-lean (oxygen-rich) composition with 1 × 10−6 mol fraction of AlCl3 and 5 × 10−4 mol fraction of B(OC2H5)3. Ions were observed by sampling the flames at atmospheric pressure through a nozzle into a mass spectrometer. At this low concentration level, aluminum exhibits two cation series: (a) AlO+•nH2O (n = 2, 3) formed by proton transfer to AlO(OH) and Al(OH)3 in which hydration reactions are involved; and (b) Al+•nH2O (n = 0, 1) by protonation of AlOH with hydration/dehydration steps. At the higher concentration of the boron additive, four cation series were observed: (a) B(OC2H5)3H+•nH2O (n = 0, 1) based on proton transfer to the B(OC2H5)3 additive; (b) BO+•nH2O (n = 1–4) similar to aluminum; (c) HB2O3+•nH2O (n = 1–3) involving the protonated dimer of metaboric acid, BO(OH); and (d) B3O4+•nH2O (n = 2, 3) involving the protonated trimer of BO(OH) whose structures might be cyclic or linear. Other series members are formed by subsequent hydration or dehydration of the parent cations. The anions BO2− and BO− previously studied by D. E. Jensen were also observed. The formation chemistry and probable structures of these ions are discussed, and compared with similar results obtained previously for flames doped with transition metals; notably Sc, Ti, V, and Cr in the +3 oxidation state. Keywords: aluminum, boron, ions, flame, gas phase.

Photoionization mass spectrometer studies of gas phase ozone-olefin reactions

1973 ◽  
Vol 95 (23) ◽  
pp. 7592-7599 ◽  
Author(s):  
R. Atkinson ◽  
B. J. Finlayson ◽  
J. N. Pitts
Keyword(s):  
Gas Phase ◽  
Mass Spectrometer
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