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The structure analysis of quasi-molecular ion of nickel EDTA complex by means of FAB MS/MS [fast atom bombardment mass spectrometry]

The structure analysis of quasi-molecular ion of nickel EDTA complex by means of FAB MS/MS [fast atom bombardment mass spectrometry]. Isa, Kimio; Kinoshita, Toshiaki; Kido, Hiroki; Nakata, Ryuji; Mizuta, Keiko (Fac. Educ., Fukui Univ., Fukui 910, Japan).Chemicals with cas numbers 139-33-3 and 14531-56-7 also play role. Nippon Kagaku Kaishi, (11), 1657-64 (Japanese) 1986. CODEN: NKAKB8. ISSN: 0369-4577. DOCUMENT TYPE: Journal CA Section: 73 (Optical, Electron, and Mass Spectroscopy and Other Related Properties) A Ni EDTA complex was measured by FAB MS/MS. Quasi-mol. ions, (M-A+H)+, (M+H)+, and (M+A)+, where M=parent, A =alkali metal were obtained by this technique. The collisionally activated decompn. (CAD) spectra of these precursor ions, (M-A+H)+ m/z 371, (M+H)+ m/z 393, and (M+A)+ m/z 415 obtained by tandem mass spectrometry are characteristic of the ion structure. Almost all the cases indicate the main eliminations of COOH(-45) and 2 COOH(-90). In the case of (M-A+H)+ precursor ion, the elimination of H2O (-18) was obsd., but in the case of (M+H)+ precursor ion the elimination of CO (-28) as well as H2O was obsd. But in the case of (M+A)+ precursor ion, the elimination of CO(-28) increased extremely. In the case of (M-A+H)+ precursor ion, the CAD spectra of m/z 371, m/z 165 were the largest ion without contg. Ni metal, and it was confirmed using the Ni isotope. Nonmetal, Li2, Na2, and K2 EDTA were measured by FAB MS/MS. In the case of CAD of (M+H)+ ion of Na2 EDTA, m/z 90 (CO2Na2+) as the main fragment peak was turned out to be O combined with 2 Na. .