scholarly journals Discrimination among geometrical isomers of α-linolenic acid methyl ester using low energy electron ionization mass spectrometry

2009 ◽  
Vol 20 (7) ◽  
pp. 1272-1280 ◽  
Author(s):  
Leila Hejazi ◽  
Diako Ebrahimi ◽  
Michael Guilhaus ◽  
D. Brynn Hibbert
Keyword(s):  
Mass Spectrometry ◽  
Methyl Ester ◽  
Acid Methyl Ester ◽  
Electron Ionization Mass Spectrometry ◽  
Low Energy ◽  
Ionization Mass ◽  
Geometrical Isomers ◽  
Acid Methyl ◽  
Linolenic Acid Methyl Ester ◽  
Low Energy Electron

Potential of electrospray ionization mass spectrometry (ESI-MS), using direct infusion, to quantify fatty acid methyl esters (FAMEs) in biodiesel

2017 ◽  
Vol 9 (26) ◽  
pp. 3949-3955
Author(s):  
Rodrigo V. P. Leal ◽  
Gabriel F. Sarmanho ◽  
Luiz H. Leal ◽  
Bruno C. Garrido ◽  
Lucas J. Carvalho ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Fatty Acid ◽  
Methyl Ester ◽  
Fatty Acid Methyl Esters ◽  
Methyl Esters ◽  
Acid Methyl Ester ◽  
Ionization Mass ◽  
Direct Infusion ◽  
Esi Ms ◽  
Acid Methyl

Fatty acid methyl ester (FAME) intensities, by ESI-MS, used to their quantification in biodiesel.

Structure of a psoralen—linolenic acid methyl ester photocycloadduct

1990 ◽  
Vol 7 (2-4) ◽  
pp. 347-352 ◽  
Author(s):  
S. Caffieri ◽  
A.W.M. Lefeber ◽  
F. Dall'Acqua ◽  
G.M.J.Beijersbergen van Henegouwen
Keyword(s):  
Methyl Ester ◽  
Linolenic Acid ◽  
Acid Methyl Ester ◽  
Acid Methyl ◽  
Linolenic Acid Methyl Ester

Mechanismen der elektronenstoßinduzierten Methanoleliminierung aus ortho- und para-substituierten Benzoesäuremethylestern / Mechanisms of Electron Impact Induced Elimination of Methanol from ortho- and para-Substituted Benzoic Acid Methyl Ester

1976 ◽  
Vol 31 (6) ◽  
pp. 870-875 ◽  
Author(s):  
Rupert Herrmann ◽  
Helmut Schwarz
Keyword(s):  
Mass Spectrometry ◽  
Methyl Ester ◽  
Benzoic Acid ◽  
Electron Impact ◽  
Acid Methyl Ester ◽  
Ring Expansion ◽  
Acid Methyl ◽  
Π Complex ◽  
Fragmentation Reactions ◽  
Ring Expansion Reaction

Using deuterium labelled compounds the mechanisms of methyl as well as methanol elimination from the title compounds have been established. It can be shown that in the case of 4-methoxy-methyl benzoic acid methyl ester the unusual methanol elimination from the [M-methyl]+ ion probably proceeds via the formation of a π-complex and a ring expansion reaction. In addition to this novel fragmentation some ortho-effects and other fragmentation reactions useful for an analytical identification of the ortho/para-isomers by means of mass spectrometry are discussed.

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