Raman spectroscopic analysis of thecis/trans isomer composition of edible vegetable oils |
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| Authors: | Glen F. Bailey Robert J. Horvat |
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| Affiliation: | (1) Western Regional Research Laboratory, 94710 Berkeley, California;(2) Present address: Richard B. Russell Agr. Res. Center, ARS, USDA, P.O. Box 5677, 30604 Athens, Ga. |
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| Abstract: | A new method is presented for determining thecis/trans isomer content of edible vegetable oils. The intensities of Raman lines near 1656 and 1670 cm−1 are associated with thecis andtrans configuration, respectively. A precision of ca. 1% can be obtained in thecis/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%. Presented at the AOCS meeting, Houston, May 1971. W. Market. Nutr. Res. Div., ARS, USDA. |
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