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Direct determination of trans unsaturation in triglycerides by infrared spectrophotometry
Author(s) -
Szonyi C.,
Tait R. S.,
Craske J. D.
Publication year - 1962
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/bf02638115
Subject(s) - degree of unsaturation , infrared spectrophotometry , chemistry , spectrophotometry , infrared , absorption (acoustics) , infrared spectroscopy , analytical chemistry (journal) , chromatography , organic chemistry , materials science , physics , optics , composite material
A differential infrared spectrophotometric method is described for the determination of trans unsaturation in fats. The method utilizes absorption at 965 cm 蜢1 , due to the C蜢H out‐of‐plane deformation vibrations of trans unsaturated compounds. The method is rapid, accurate, and directly applicable to the determination of trans unsaturation in triglycerides. It is applicable to samples which contain low concentrations of trans acids (down to 2%) and also to samples with fatty acids of mixed chain length.