Negative ion electrospray ionization mass spectral study of dicarboxylic acids in the presence of halide ions

2004 ◽  
Vol 18 (10) ◽  
pp. 1109-1115 ◽  
Author(s):  
M. Ravi Kumar ◽  
S. Prabhakar ◽  
M. Kiran Kumar ◽  
T. Jagadeshwar Reddy ◽  
M. Vairamani
Keyword(s):  
Electrospray Ionization ◽  
Spectral Study ◽  
Dicarboxylic Acids ◽  
Negative Ion ◽  
Ionization Mass ◽  
Halide Ions ◽  
Mass Spectral ◽  
Mass Spectral Study

scholarly journals Discrimination of structural isomers of amphetamine using carbon dioxide negative-ion chemical ionization mass spectrometry

1997 ◽  
Vol 13 (2) ◽  
pp. 151-161 ◽  
Author(s):  
Kevin B. Thurbide ◽  
C. M. Elson ◽  
P. G. Sim
Keyword(s):  
Carbon Dioxide ◽  
Mass Spectra ◽  
Chemical Ionization ◽  
Negative Ion ◽  
Ionization Mass ◽  
Structural Isomers ◽  
Mass Spectral ◽  
Negative Ion Chemical Ionization ◽  
Spectral Behaviour ◽  
Carbon Dioxide Plasma

The negative‒ion chemical ionization mass spectra of a group of structural isomers of amphetamine have been studied using carbon dioxide as the reagent gas. Characteristic and reproducible differences are observed for each member of the set implying that this technique offers a means of distinguishing among groups of amphetamine isomers. Characteristic adducts to the molecular ion are observed in the form (M–[H]+[O]) and (M–[H]+[CO2]). Descriptions of some fragments are given based on the mass spectral behaviour of a set of analogue compounds and the results of oxygen-18 labelled carbon dioxide reagent gas experiments. Contents of the carbon dioxide plasma and their impact on various analytes is also discussed.

Fast atom bombardment mass spectral study of tetracycline antibiotics

1993 ◽  
Vol 28 (12) ◽  
pp. 1512-1515 ◽  
Author(s):  
Ken-Ichi Harada ◽  
Katsuyoshi Masuda ◽  
Makoto Suzuki ◽  
Hisao Oka ◽  
Yoshitomo Ikai ◽  
...  
Keyword(s):  
Spectral Study ◽  
Fast Atom Bombardment ◽  
Tetracycline Antibiotics ◽  
Mass Spectral ◽  
Mass Spectral Study

The alkoxides of zirconium and hafnium: direct electrochemical synthesis and mass-spectral study. Do ?M(OR)4?, where M=Zr, Hf, Sn, really exist?

1995 ◽  
Vol 44 (4) ◽  
pp. 734-742 ◽  
Author(s):  
E. P. Turevskaya ◽  
N. I. Kozlova ◽  
N. Ya. Turova ◽  
A. L. Belokon' ◽  
D. V. Berdyev ◽  
...  
Keyword(s):  
Electrochemical Synthesis ◽  
Spectral Study ◽  
Mass Spectral ◽  
Mass Spectral Study
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