The use of electron impact and positive chemical ionization mass spectrometry in the screening of beta blockers and their metabolites in human urine

1990 ◽  
Vol 19 (3) ◽  
pp. 137-142 ◽  
Author(s):  
M. S. Leloux ◽  
R. A. A. Maes
Keyword(s):  
Mass Spectrometry ◽  
Electron Impact ◽  
Human Urine ◽  
Chemical Ionization ◽  
Beta Blockers ◽  
Ionization Mass Spectrometry ◽  
Chemical Ionization Mass Spectrometry ◽  
Ionization Mass ◽  
Positive Chemical Ionization

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.

Determination of histamine by chemical ionization mass spectrometry: Application to human urine

1983 ◽  
Vol 10 (8) ◽  
pp. 480-484 ◽  
Author(s):  
J. J. Keyzer ◽  
H. Breukelman ◽  
H. Elzinga ◽  
B. J. Koopman ◽  
B. G. Wolthers ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Human Urine ◽  
Chemical Ionization ◽  
Ionization Mass Spectrometry ◽  
Chemical Ionization Mass Spectrometry ◽  
Ionization Mass ◽  
Mass Spectrometry Application

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.

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