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Proton affinity of peroxyacetyl nitrate sampled by membrane introduction mass spectrometry
Author(s) -
Srinivasan N.,
Cooks R. G.,
Shepson P. B.
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(19980331)12:6<328::aid-rcm161>3.0.co;2-i
Subject(s) - chemistry , proton affinity , peroxyacetyl nitrate , mass spectrometry , ion , adduct , collision induced dissociation , dissociation (chemistry) , proton , analytical chemistry (journal) , molecule , tandem mass spectrometry , bond dissociation energy , chromatography , organic chemistry , nuclear physics , combustion , physics , protonation , nox
Peroxyacetyl nitrate (PAN) is a fragile, highly reactive molecule which has proven difficult to characterize by mass spectrometry. This study investigates the use of a membrane introduction system to sample PAN and demonstrates that the molecular ions [M+H] + , [M+H] − and M −• can be generated under chemical ionization conditions. Use of tandem mass spectrometry provides characteristic spectra. These capabilities are applied to generate adduct ions of PAN with reference compounds of known proton affinity. Collision induced dissociation of these ions gives, by application of the kinetic method relationship, an estimated value of 191 ± 3 kcal/mol (798 ± 12 kJ/mol) for the proton affinity of PAN. © 1998 John Wiley & Sons, Ltd.