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Redox transformations in desorption electrospray ionization
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SYSNO ASEP 0327485 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Redox transformations in desorption electrospray ionization Author(s) Benassi, M. (BR)
Wu, Ch. (AT)
Nefliu, M. (US)
Ifa, D. R. (US)
Volný, Michael (MBU-M) ORCID
Cooks, R. G. (US)Source Title International Journal of Mass Spectrometry. - : Elsevier - ISSN 1387-3806
Roč. 280, 1-3 (2009), s. 235-240Number of pages 6 s. Language eng - English Country NL - Netherlands Keywords mass spectrometry ; desorption electrospray ionization ; oxidation of biomolecules Subject RIV CB - Analytical Chemistry, Separation CEZ AV0Z50200510 - MBU-M (2005-2011) UT WOS 000263195500037 DOI 10.1016/j.ijms.2008.10.012 Annotation Redox changes occur in some circumstances when organic compounds are analyzed by desorption electrospray ionization mass spectrometry (DESI-MS). However, these processes are limited in scope and the data presented here suggest that there are only limited analogies between the redox behavior in DESI and the well-known solution-phase electrochemical processes in standard electrospray ionization (ESI). Positive and negative ion modes were both investigated and there is a striking asymmetry between the incidence of oxidation and of reduction. Although in negative ion mode DESI experiments, some aromatic compounds were ionized as odd-electron anion radicals, examples of full reduction were not found. By contrast, oxidation in the form of oxygen atomaddition (or multiple oxygen atomadditions)was observed for several different analytes Workplace Institute of Microbiology Contact Eliška Spurná, eliska.spurna@biomed.cas.cz, Tel.: 241 062 231 Year of Publishing 2010
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