Role of electrons in laser desorption/ionization mass spectrometry

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Author(s) Frankevich, Vladimir E., Zhang, Juan, Friess, Sebastian D., Dashtiev, Maxim, Zenobi, Renato
Publication Type Journal Items, Publication Status: Published
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Title Role of electrons in laser desorption/ionization mass spectrometry
Author(s) Frankevich, Vladimir E.
Zhang, Juan
Friess, Sebastian D.
Dashtiev, Maxim
Zenobi, Renato
Journal or Series Title Analytical chemistry
Volume Number 75
Issue Number 22
Start Page 6063
End Page 6067
ISSN 0003-2700
Publisher American Chemical Society
Publication Place Washington, D.C.
Publication Date 2003-11
Abstract A nonmetallic sample support for matrix-assisted laser desorption/ionization (MALDI) mass spectrometry enhances the positive ion yield by 2 orders of magnitude and generally affects the charge balance in the desorption plume. We interpret the effects of the target material and of the sample preparation on MALDI mass spectra as a result of photoelectrons emitted upon laser irradiation of a metal target covered by a thin sample layer. These electrons are shown to play an important role in MALDI and laser desorption/ionization because they decrease the yield of positive ions, reduce ions with higher oxidation states, and affect the ion velocity distribution as well as the mass resolution. Understanding the role of these photoelectrons helps to clarify previously obscure aspects of the ion formation mechanism in MALDI.
DOI 10.1021/ac034436j
Document Type Article
Publication Status Published
Language English
Assigned Organisational Unit(s) 03430
Organisational Unit(s)
NEBIS System Number 000005465
Source Database ID WOS-000186601500005
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  author = "Frankevich, Vladimir E. and Zhang, Juan and Friess, Sebastian D. and Dashtiev, Maxim and Zenobi, Renato",
  title = "{R}ole of electrons in laser desorption/ionization mass spectrometry",
  journal = "Analytical chemistry",
  year = 2003,
  volume = "75",
  number = "22",
  pages = "6063--6067",
  month = nov,

E-Citations record created: Fri, 24 Aug 2012, 16:46:32 CET