170 research outputs found
A low-noise, wideband preamplifier for a fourier-transform ion cyclotron resonance mass spectrometer
Transformative effects of higher magnetic field in Fourier transform ion cyclotron resonance mass spectrometry
Termolecular ion-molecule reactions in Titan’s atmosphere. IV. A search made at up to 1 micron in pure hydrocarbons
First signal on the cryogenic fourier-transform ion cyclotron resonance mass spectrometer
Efficiency of Collisionally-activated dissociation and 193-nm photodissociation of peptide ions in fourier transform mass spectrometry
AbstractFor tandem mass spectrometry, the Fourier transform instrument exhibits advantages for the use of collisionally-activated dissociation (CAD). The CAD energy deposited in larger ions can be greatly increased by extending the collision time to as much as 120 s, and the efficiency of trapping and measuring CAD product ions in many times greater than the found for triple-quadrupole or magnetic sector instruments, although the increased pressure from the collision gas is an offsetting disadvantage. A novel system that uses the same laser for photodesorption of ions and their subsequent photodissociation can produce complete dissociation of larger oligopeptide ions and unusually abundant fragment ions. In comparison to CAD, much more internal energy can be deposited in the primary ions using 193-nm photons, sufficient to dissociate peptide ions of m/z > 2000. Mass spectra closely resembling ion photodissociation spectra can also be obtained by neutral photodissociation (193-nm laser irradiation of the sample) followed by ion photodesorption
Improved mass accuracy for higher mass peptides by using SWIFT excitation for MALDI-FTICR mass spectrometry
Use of a double resonance electron capture dissociation experiment to probe fragment intermediate lifetimes
Utilizing artificial neural networks in matlab to achieve parts-per-billion mass measurement accuracy with a fourier transform ion cyclotron resonance mass spectrometer
A novel fourier transform ion cyclotron resonance mass spectrometer with improved ion trapping and detection capabilities
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