Electronic Resource
Chichester
:
Wiley-Blackwell
Biological Mass Spectrometry
3 (1970), S. 1499-1503
ISSN:
0030-493X
Keywords:
Chemistry
;
Analytical Chemistry and Spectroscopy
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
Differences in the appearance potentials of normal fragment ions and of metastable transitions leading to the formation of the same fragment ions have been measured in the mass spectra of a number of compounds. The differences varied from 0.1 to 1.0 eV and were attributed to the measurable part of the kinetic shift. An approximate correlation was found between the intensity of a ‘metastable peak’ and the observed difference in appearance potentials, and it is suggested that the full kinetic shift for processes giving rise to intense ‘metastable peaks’ is substantially larger than the measurable part. The implications of this in thermochemical calculations are discussed.
Additional Material:
1 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/oms.1210031206
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