Analysis of Multiply Charged Ions of Ruthenium(II) Tetranuclear Complexes by Electrospray Ionization Mass Spectrometry

1995 ◽  
Vol 34 (9) ◽  
pp. 2464-2467 ◽  
Author(s):  
Ryuichi Arakawa ◽  
Takekiyo Matsuo ◽  
Koichi Nozaki ◽  
Takeshi Ohno ◽  
Masa-aki Haga
Keyword(s):  
Mass Spectrometry ◽  
Electrospray Ionization ◽  
Electrospray Ionization Mass Spectrometry ◽  
Ionization Mass Spectrometry ◽  
Ionization Mass ◽  
Multiply Charged Ions ◽  
Multiply Charged ◽  
Charged Ions ◽  
Tetranuclear Complexes

Analysis of Polypropyleneglycols Using Electrospray Ionization Mass Spectrometry. Effects of Cationizing Agents on the Mass Spectra

2003 ◽  
Vol 9 (2) ◽  
pp. 97-103 ◽  
Author(s):  
Shoji Okuno ◽  
Masayoshi Ohmoto ◽  
Ryuichi Arakawa
Keyword(s):  
Mass Spectrometry ◽  
Electrospray Ionization ◽  
Electrospray Ionization Mass Spectrometry ◽  
Linear Structure ◽  
Ionization Mass Spectrometry ◽  
Cone Voltage ◽  
Ionization Mass ◽  
Esi Ms ◽  
Molecular Weights ◽  
Charged Ions

In electrospray ionization mass spectrometry (ESI-MS) of polypropyleneglycol (PPG), effects of cationizing agents were examined. When NaI was used as a cationizing agent, the distribution of multiply-charged ions in the spectra was greatly affected by the ratio of cationizing agent and PPG. However, the distribution was not affected by the use of CH3COONH4. With an increase of cone voltage, fragmentation occurred by in-source collision-induced dissociation (CID) when CH3COONH4 was used. On the contrary, no decomposition of the PPG backbone was observed with NaI. Instead, the intensity of the lower-charged ions, whose mass-to-charge ( m/z) ratios are larger, increased because of the elimination of Na+ with increase of cone voltage. Under optimum conditions for ESI-MS analysis, PPGs that have different molecular weights, different initiators or end groups were easily and accurately characterized. A tandem mass spectrometry (MS/MS) study of NH4+ adduct ions of PPG indicated that a vinyl-terminated linear structure is formed at the end group during the fragmentation.

Sign in / Sign up

Export Citation Format

Share Document