Document Detail

Distinguishing between cis/trans isomers of monounsaturated fatty acids by FAB MS.
MedLine Citation:
PMID:  17243767     Owner:  NLM     Status:  MEDLINE    
Fast-atom bombardment (FAB) mass spectrometry in the negative ion mode can be used to unambiguously distinguish between cis and trans isomers of monounsaturated fatty acids by the relative signal strengths of an intense pair of ion signals. Under normal FAB ionization/desorption conditions, the deprotonated molecules (i.e., [M - H]-) of six fatty acids underwent charge remote fragmentation. A characteristic fragmentation pattern of two intense peak clusters of peaks with three weak intervening clusters of peaks are used in each case to identify the position of the double bond. The possibility of resonance electron capture occurring during the FAB process is discussed.
Hong Ji; Valery G Voinov; Max L Deinzer; Douglas F Barofsky
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Publication Detail:
Type:  Journal Article; Research Support, N.I.H., Extramural; Research Support, Non-U.S. Gov't     Date:  2007-01-23
Journal Detail:
Title:  Analytical chemistry     Volume:  79     ISSN:  0003-2700     ISO Abbreviation:  Anal. Chem.     Publication Date:  2007 Feb 
Date Detail:
Created Date:  2007-02-14     Completed Date:  2007-04-12     Revised Date:  2007-12-03    
Medline Journal Info:
Nlm Unique ID:  0370536     Medline TA:  Anal Chem     Country:  United States    
Other Details:
Languages:  eng     Pagination:  1519-22     Citation Subset:  IM    
Department of Chemistry, Oregon State University, Corvallis, Oregon 97331, USA.
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MeSH Terms
Fatty Acids, Monounsaturated / analysis*
Sensitivity and Specificity
Spectrometry, Mass, Fast Atom Bombardment / methods*
Grant Support
Reg. No./Substance:
0/Fatty Acids, Monounsaturated

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