Počet záznamů: 1
Analysis of Ketones by Selected Ion Flow Tube Mass Spectrometry
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SYSNO ASEP 0181823 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Ostatní články Název Analysis of Ketones by Selected Ion Flow Tube Mass Spectrometry Tvůrce(i) Smith, D. (GB)
Wang, T. (GB)
Španěl, Patrik (UFCH-W) RID, ORCIDZdroj.dok. Rapid Communications in Mass Spectrometry. - : Wiley - ISSN 0951-4198
Roč. 17, - (2003), s. 2655-2660Poč.str. 6 s. Jazyk dok. eng - angličtina Země vyd. GB - Velká Británie Klíč. slova mass spectrometry ; selected ion flow tube ; ketones Vědní obor RIV CF - Fyzikální chemie a teoretická chemie CEP GA202/03/0827 GA ČR - Grantová agentura ČR GA203/02/0737 GA ČR - Grantová agentura ČR CEZ AV0Z4040901 - UFCH-W Anotace 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. Pracoviště Ústav fyzikální chemie J.Heyrovského Kontakt Michaela Knapová, michaela.knapova@jh-inst.cas.cz, Tel.: 266 053 196 Rok sběru 2004
Počet záznamů: 1