✦ LIBER ✦

Proton affinity of peroxyacetyl nitrate sampled by membrane introduction mass spectrometry

✍ Scribed by N. Srinivasan; R. G. Cooks; P. B. Shepson

Publisher: John Wiley and Sons
Year: 1998
Tongue: English
Weight: 184 KB
Volume: 12
Category: Article
ISSN: 0951-4198
DOI: 10.1002/(sici)1097-0231(19980331)12:6<328::aid-rcm161>3.0.co;2-i

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✦ Synopsis

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 [MH] , [MH] À and M À * 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 AE 3 kcal/mol (798 AE 12 kJ/mol) for the proton affinity of PAN.

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