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Ultraviolet spectrophotometric characteristics of unhydrogenated fish oils
Author(s) -
Lambert Reuben S.,
Andrews J. T. R.
Publication year - 1948
Publication title -
journal of the american oil chemists' society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.512
H-Index - 117
eISSN - 1558-9331
pISSN - 0003-021X
DOI - 10.1007/bf02593293
Subject(s) - fish <actinopterygii> , ultraviolet , fish oil , polyunsaturated fatty acid , absorption (acoustics) , isomerization , linseed oil , chemistry , materials science , food science , organic chemistry , fatty acid , biology , fishery , optoelectronics , composite material , catalysis
Summary Typical ultraviolet spectrophotometric absorption curves are presented for unhydrogenated fish oils of commercial importance, before and after alkali isomerization. These curves show the usual maxima for isomerized polyunsaturated fatty acids, including five, and possibly six, double bonds. Tetraene absorption is sufficient to obliterate that of trienes completely. Such a method of analysis affords an easy means of detecting unhydrogenated fish oil contamination in the ordinary vegetable and animal oils and fats as well as a test for the presence of fish oils in admixture with raw linseed oil.