FTIR estimation of free fatty acid content in crude oils extracted from damaged soybeans View Full Text


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Article Info

DATE

1991-06

AUTHORS

A. C. Lanser, G. R. List, R. K. Holloway, T. L. Mounts

ABSTRACT

A user-interactive computer-assisted Fourier transform infrared (FTIR) method has been developed for estimation of free fatty acids (FFA) in vegetable oil samples by deconvolution of the infrared (IR) absorbances corresponding to the triglyceride ester and FFA carbonyl bonds. Peak areas were used to determine FFA as a percentage of the total carbonyl areas in weighed standards of refined, bleached, deodorized soybean oil containing from 0 to 5% added oleic acid. These data for percent FFA by FTIR were compared to corresponding FFA data obtained by two titration methods-the AOCS Official Method Ca 5a-40 and the Official Method with a slight modification. Correlation coefficients were 0.999 for the Ca 5a-40, 0.999 for the modified and 0.989 for the FTIR methods. FFA in samples of crude soybean oils extracted from damaged beans (0.5 to 2.1% FFA) were measured by FTIR and compared to data obtained by titration of the same samples (correlation coefficient, 0.869). More... »

PAGES

448-449

References to SciGraph publications

Identifiers

URI

http://scigraph.springernature.com/pub.10.1007/bf02663767

DOI

http://dx.doi.org/10.1007/bf02663767

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1030875643


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