ISSN:
1750-3841
Source:
Blackwell Publishing Journal Backfiles 1879-2005
Topics:
Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
,
Process Engineering, Biotechnology, Nutrition Technology
Notes:
Isolation and identification of a number of volatile monocarbonyls from autoxidized salmon oil were accomplished. The carbonyls, volatile by vacuum steam distillation, were reacted with 2,4-dinitrophenylhydrazine. The 2,4-dinitrophenyl-hydrazones were separated by partition and paper chromatograpy. Spectrophotometric analyses and melting-point determinations were made. The data show that, in addition to malonaldehyde previously reported, positive identification was made on 15 monocarbonyls: the C2, C3, C5, C6, C7, C8, and C9 alkanals; the C3, C4, C5, C6, C8, C9, and C10 2-enals; and hept-2,4-dienal. Tentative identification of butanal, dec-2,4-dienal, and undec-2-enal was based upon a comparison of chro-matographic behavior and absorption spectra of the authentic with the unknown. The isolated ketones, tentatively identified as 2-hexanone, 2-octanone, 2-nonanone, and 2-decanone, were characterized by the preceding methods and by their behavior in alcoholic potassium hydroxide. Five additional compounds of unknown identity were isolated; three provided sufficient material for melting-point determinations. Including the forerun, at least 28 carbonyls were found in the volatile portion of rancid salmon oil.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1111/j.1365-2621.1961.tb00791.x
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