Počet záznamů: 1
Analysis of Ketones by Selected Ion Flow Tube Mass Spectrometry
- 1. 0181823 - UFCH-W 20030265 RIV GB eng J - Článek v odborném periodiku
Smith, D. - Wang, T. - Španěl, Patrik
Analysis of Ketones by Selected Ion Flow Tube Mass Spectrometry.
Rapid Communications in Mass Spectrometry. Roč. 17, - (2003), s. 2655-2660. ISSN 0951-4198
Grant CEP: GA ČR GA202/03/0827; GA ČR GA203/02/0737
Výzkumný záměr: CEZ:AV0Z4040901
Klíčová slova: mass spectrometry * selected ion flow tube * ketones
Kód oboru RIV: CF - Fyzikální chemie a teoretická chemie
Impakt faktor: 2.789, rok: 2003
A selected ion flow tube-mass spectrometry (SIFT-MS) study of the reactions of H3O+, NO+ and O2+. ions with the ketones (M) 2-heptanone, 2-octanone, 2-nonanone, 2-undecanone and 2-aminoacetophenone, has been conducted in preparation for studies of volatile emissions from bacteria. The H3O+ reactions all proceed rapidly via exothermic proton transfer, producing only MH+ ions that form their monohydrates when water vapour is present in the helium carrier gas. The O2+. reactions proceed rapidly via dissociative charge transfer producing parent cations M+. and some fragment ions. The NO+ reactions form the NO+M adduct ions at rates which are dependent on the pressure of the helium carrier gas. Combining the present NO+ kinetic data with those available from previous SIFT studies, the phenomenon of charge transfer complexing is clearly demonstrated. This results in adduct formation in these NO+/ketone reactions at or near the collisional rate. SIFT-MS spectra.
Trvalý link: http://hdl.handle.net/11104/0001941