Solution chemistry and secondary ion emission from amine-glycerol solutions

Secondary ion mass spectra were obtained from a series of C 4C 10 n-alkylamines introduced via the gas phase onto glycerol. It was found that the amine-characteristic secondary ion intensity varied linearly with amine partial pressure. Henry's law constants and surface activity constants for e...

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Bibliographic Details
Published in:Journal of the American Society for Mass Spectrometry 1991, Vol.2 (1), p.33-44
Main Author: Todd, Peter J.
Format: Article
Language:English
Subjects:
Chemistry
Exact sciences and technology
Mass spectrometry
Organic chemistry
Reactivity and mechanisms
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Summary:Secondary ion mass spectra were obtained from a series of C 4C 10 n-alkylamines introduced via the gas phase onto glycerol. It was found that the amine-characteristic secondary ion intensity varied linearly with amine partial pressure. Henry's law constants and surface activity constants for each of the amines in glycerol solution were measured. A linear correlation was found between amine-characteristic secondary ion intensity and Henry's law concentrations. The concentrations calculated from Henry's law were too low to yield the intensities observed, indicating that secondary ion precursors were not free-base amine molecules but ions in solution. Explicit kinetic equations describing glycerol and amine protonation and deprotonation as a result of primary ion damage to the solutions are derived to rationalize the observed spectra.
ISSN:1044-0305
1879-1123
DOI:10.1016/1044-0305(91)80059-G