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Mass spectrometric indication of double bond position in dodecenals without any chemical derivatization

✍ Scribed by Michio Horiike; Chisato Hirano

Publisher: John Wiley and Sons
Year: 1988
Tongue: English
Weight: 371 KB
Volume: 17
Category: Article
ISSN: 1076-5174
DOI: 10.1002/bms.1200170413

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✦ Synopsis

Ten positional isomers (A2-A1') of unmodified dodecenal were analysed by conventional combined gas chromatography/electron impact mass spectrometry. The relative abundances of some predominant fragments in the isomers examined varied with the position of the original double bond. Eminent dominance of a particular isomer over the others in their relative intensities was observed at some fragment ion peaks. The intensity ratios of certain selected pairs of predominant fragment ions are of diagnostic value for the identification of the double bond position. A procedure for the characterization of the double bond position in the chain is given.

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