Hydrogenation of unsaturated fatty esters during isobutane chemical ionization mass spectrometry |
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Authors: | William K Rohwedder Sandra M Cox |
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Affiliation: | (1) Northern Regional Research Center, Agricultural Research Service, U.S. Department of Agriculture, 61604 Peoria, Illinois |
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Abstract: | Hydrogenation of double bonds was observed to occur during the isobutane chemical ionization mass spectrometry (MS) of unsaturated
fatty esters. Chemical ionization (CI) spectra of a series of methyl esters in the C16–C20 carbon range containing 0–4 double
bonds showed a variety of ionization characteristics in the molecular ion cluster, including hydride abstraction, charge exchange,
protonation and, for the unsaturated fatty acids (FA), hydrogenation of the double bond followed by protonation.
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