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Estimating the average carbon chain length of saturated fatty acid esters by infrared spectroscopy
Author(s) -
Keeney P. G.
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/bf02638124
Subject(s) - carbon chain , chemistry , fractionation , fatty acid , infrared spectroscopy , acetone , carbon fibers , absorption (acoustics) , infrared , fatty acid methyl ester , gas chromatography , chromatography , organic chemistry , materials science , biodiesel , physics , composite number , optics , composite material , catalysis
The average carbon chain length of saturated fatty acid esters can be determined by comparing absorption intensities in the 3.3 and 5.75 ॖ infrared regions. Data are presented for triglycerides, monoglycerides, and methyl esters. The method was used to follow the fractionation of hydrogenated milk fat from acetone, and the average values for fatty acid chain length were in good agreement with those obtained by gas chromatographic methyl ester analysis. The I.R. method is particularly applicable when only a few mg of sample is available and the material being fractionated contains both long and short chain saturated fatty acids.