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Endothermic ion/molecule reactions III. High energy collisional activation at low kinetic energies
Author(s) -
Orlando Ron,
Fenselau Catherine,
Cotter Robert J.
Publication year - 1990
Publication title -
rapid communications in mass spectrometry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.528
H-Index - 136
eISSN - 1097-0231
pISSN - 0951-4198
DOI - 10.1002/rcm.1290040708
Subject(s) - chemistry , endothermic process , kinetic energy , dissociation (chemistry) , ion , collision induced dissociation , atomic physics , mass spectrometry , tandem mass spectrometry , adsorption , organic chemistry , physics , quantum mechanics , chromatography
Endothermic reactions between leucine enkephalin and ammonia have been carried out at very low beam energies, and compared with activation obtained by conventional collision‐induced dissociation at both low and high energies. The similarity between the high‐energy and the reactive‐collisions spectra suggest that comparable energies are imparted by these two methods. The upper limit of the collision energy deposited by reactive collisions is only 0.30 eV. In addition, a substantial increase in the collection efficiency is observed with endothermic reactions, with the sum of the fragment ions exceeding the intensity of the surviving parent ions.