Journal
JOURNAL OF PHYSICAL CHEMISTRY A
Volume 111, Issue 42, Pages 10635-10639Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jp073309e
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A variation of the kinetic method for the analysis of fragmentation patterns in mass spectra is proposed. The procedure presents three notable features: no evaluation of the effective temperature of the parent ion is required; the ratio of the activation energies for all competitive channels at play are provided; and the measurement is not biased by the mass discrimination of the instrument. The method is based on the analysis of mass spectra recorded as a function of both the excitation energy and the excitation time. Collision-activated dissociation of protonated Leu-enkephalin achieved in a quadrupolar ion trap and analyzed with this method is presented.
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