Electron impact and isobutane and ammonia chemical ionization mass spectrometry of some tetrahydropyranyl acetals

1989 ◽  
Vol 24 (6) ◽  
pp. 415-420 ◽  
Author(s):  
Pirjo Vainiotalo ◽  
Pentti J. Mälkönen ◽  
Anto Vainiotalo
Keyword(s):  
Mass Spectrometry ◽  
Electron Impact ◽  
Chemical Ionization ◽  
Ionization Mass Spectrometry ◽  
Chemical Ionization Mass Spectrometry ◽  
Ionization Mass

Occurrence of 3-acetamido-3,6-dideoxy-4-O-miethyl-L-glucose in the O-polysaccharide of Vibrio anguillarum

1985 ◽  
Vol 63 (12) ◽  
pp. 1265-1267 ◽  
Author(s):  
Joseph H. Banoub ◽  
Francis Michon ◽  
Fred Cooper
Keyword(s):  
Mass Spectrometry ◽  
Electron Impact ◽  
Chemical Ionization ◽  
Vibrio Anguillarum ◽  
Amino Sugar ◽  
Bacterial Lipopolysaccharide ◽  
Ionization Mass Spectrometry ◽  
Chemical Ionization Mass Spectrometry ◽  
Ionization Mass

The amino sugar 3-acetamido-3,6-dideoxy-4-O-methyl-L-glucose has been characterized in the O-polysaccharide obtained from the bacterial lipopolysaccharide of Vibrio anguillarum. The identity of 1,2,5-tri-O-acetyl-3-acetamido-3,6-dideoxy-4-O-methyl-L-glucitol has been established by electron-impact and chemical-ionization mass spectrometry and by a labeling procedure.

Chemical Ionization Mass Spectrometry of Organophosphorus Insecticides

1974 ◽  
Vol 57 (5) ◽  
pp. 1050-1055 ◽  
Author(s):  
Roy L Holmstead ◽  
John E Casida
Keyword(s):  
Mass Spectrometry ◽  
Electron Impact ◽  
Mass Spectra ◽  
Chemical Structure ◽  
Chemical Ionization ◽  
Ionization Mass Spectrometry ◽  
Chemical Ionization Mass Spectrometry ◽  
Ionization Mass ◽  
Organophosphorus Insecticides ◽  
Fragmentation Patterns

Abstract The chemical ionization (CI) mass spectra of 15 important organophosphorus insecticides and 14 of their major metabolites are discussed in relation to the effect of chemical structure on fragmentation patterns. The fragments obtained with CI are sometimes quite different from those formed on electron impact and, in general, simpler spectra are obtained with CI.

Electron impact and chemical ionization mass spectrometry of steroidal spirolactones

1978 ◽  
Vol 5 (9) ◽  
pp. 524-530 ◽  
Author(s):  
D. R. Boreham ◽  
G. C. Ford ◽  
N. J. Haskins ◽  
C. W. Vose ◽  
R. F. Palmer
Keyword(s):  
Mass Spectrometry ◽  
Electron Impact ◽  
Chemical Ionization ◽  
Ionization Mass Spectrometry ◽  
Chemical Ionization Mass Spectrometry ◽  
Ionization Mass
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