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Studies of the chromium oxygenated cluster ions produced during the laser ablation of chromium oxides by laser ablation/ionization Fourier transform ion cyclotron resonance mass spectrometry
Author(s) -
Aubriet F.,
Maunit B.,
Courrier B.,
Muller J. F.
Publication year - 1997
Publication title -
rapid communications in mass spectrometry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.528
H-Index - 136
eISSN - 1097-0231
pISSN - 0951-4198
DOI - 10.1002/(sici)1097-0231(199709)11:14<1596::aid-rcm998>3.0.co;2-k
Subject(s) - chemistry , fourier transform ion cyclotron resonance , chromium , mass spectrometry , analytical chemistry (journal) , ion , mass spectrum , laser ablation , inorganic chemistry , laser , physics , organic chemistry , chromatography , optics
Trivalent and hexavalent chromium oxides have been examined by time‐of‐flight laser microprobe mass spectrometry and Fourier transform ion cyclotron resonance mass spectrometry (FTICRMS). The positive‐ion spectra show a strong correlation with the valency of chromium in the oxide. Thus, the positive cluster ion distribution and the presence of characteristic chromium cluster ions allow us to distinguish the two oxides. Because of their important role in the formation of large chromium cluster ions, we have investigated the formation mechanism of precursor ions such as CrO + . In this context, FTICRMS has been used to detect the presence of singlet oxygen 1 O 2 ( 1 Δ g ) and to show its importance in the clustering process. Finally, our hypothesis concerning CrO + formation involving the Cr + ion and singlet oxygen 1 O 2 ( 1 Δ g ) was confirmed. © 1997 John Wiley & Sons, Ltd.