Reduction of Cu(II) in matrix-assisted laser desorption/ionization mass spectrometry

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Author(s) Zhang, Juan, Frankevich, Vladimir, Knochenmuss, Richard, Friess, Sebastian D., Zenobi, Renato
Publication Type Journal Items, Publication Status: Published
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Title Reduction of Cu(II) in matrix-assisted laser desorption/ionization mass spectrometry
Author(s) Zhang, Juan
Frankevich, Vladimir
Knochenmuss, Richard
Friess, Sebastian D.
Zenobi, Renato
Journal or Series Title Journal of the American Society for Mass Spectrometry
Volume Number 14
Issue Number 1
Start Page 42
End Page 50
ISSN 1044-0305
1879-1123
Publisher Springer
Publication Place New York
Publication Date 2003-01
Abstract The mechanisms of the reduction of Cu(II) in matrix-assisted laser desorption/ionization mass spectrometry (MALDI) are studied. In MALDI mass spectra, ions cationized by copper mostly contain Cu(I) even if Cu(II) salts are added to the sample. It was found that Cu(II) was reduced to Cu(I) by gas-phase charge exchange with matrix molecules, which is a thermodynamically favorable process. Under some conditions, large amounts of free electrons are present in the plume. Cu(II) can be even more efficiently reduced to Cu(I) by free electron capture in the gas phase. The matrices studied in this work are nicotinic acid, dithranol, and 2,5-dihydroxybenzoic acid.
DOI 10.1016/S1044-0305(02)00807-3
Additional Notes Published online 28 November 2002
Document Type Article
Publication Status Published
Language English
NEBIS System Number 000541631
Source Database ID WOS-000180018800005
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@article{Zhng2003,
  author = "Zhang, Juan and Frankevich, Vladimir and Knochenmuss, Richard and Friess, Sebastian D. and Zenobi, Renato",
  title = "{R}eduction of {C}u({I}{I}) in matrix-assisted laser desorption/ionization mass spectrometry",
  journal = "Journal of the American Society for Mass Spectrometry",
  year = 2003,
  volume = "14",
  number = "1",
  pages = "42--50",
  month = jan,
}


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