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Raman spectroscopic analysis of the cis/trans isomer composition of edible vegetable oils
Author(s) -
Bailey Glen F.,
Horvat Robert J.
Publication year - 1972
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/bf02582487
Subject(s) - raman spectroscopy , cis–trans isomerism , chemistry , iodine value , composition (language) , vegetable oil , organic chemistry , food science , linguistics , physics , philosophy , optics
A new method is presented for determining the cis/trans isomer content of edible vegetable oils. The intensities of Raman lines near 1656 and 1670 cm −1 are associated with the cis and trans configuration, respectively. A precision of ca. 1% can be obtained in the cis/trans isomer analysis of binary mixtures of methyl esters and triglycerides of monoenes and dienes and of hydrogenated vegetable oils. The spectroscopic data also provide the iodine value of vegetable oils or isolated fractions with precision for a single determination of ca. 1%.