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How feasible is matrix‐assisted laser desorption/ionisation time‐of‐flight mass spectrometry analysis of polyolefins?
Author(s) -
Reinhold Meike,
Meier Robert J.,
de Koster Chris G.
Publication year - 1998
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/(sici)1097-0231(19981215)12:23<1962::aid-rcm421>3.0.co;2-j
Subject(s) - chemistry , oligomer , mass spectrometry , ethylene glycol , desorption , dissociation (chemistry) , mass spectrum , monomer , ionization , matrix assisted laser desorption/ionization , matrix isolation , analytical chemistry (journal) , polymer chemistry , molecule , organic chemistry , chromatography , ion , polymer , adsorption
Ab initio quantum calculations were applied to obtain binding energies for sodium cation–oligomer complexes comprising either methanol, ethylene glycol oligomers or n ‐alkanes. In addition, it was experimentally shown using sodium cations that ethylene glycol oligomers could not be detected when consisting of less than 5 monomers. This observation and the fact that experimentally no matrix‐assisted laser desorption/ionisation mass spectra have been reported for saturated polyolefins are now attributed to the low binding energy of the sodium–oligomer complexes, which is insufficient to prevent dissociation of the complexes in multiple collisions occurring in the extraction section of the mass spectrometer. Copyright © 1998 John Wiley & Sons, Ltd.