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Quantitative fatty acid analysis of vegetable oils by gas‐liquid chromatography

1959; Wiley; Volume: 36; Issue: 11 Linguagem: Inglês

10.1007/bf02641148

1558-9331

Béatrice Craig, N.L. Murty,

Analytical Chemistry and Sensors

Summary The fatty acid composition of a number of vegetable oils and of two synthetic mixtures of methyl esters are compared by gas‐liquid chromatography and by standard methods. The calculated iodine values from G.L.P.C. results are in good agreement with measured iodine values and are indicative of the reliability of the G.L.P.C. values. Standard methods gave lower values for linoleic acid and higher values for linolenic acid than did G.L.P.C. This deviation was particularly evident in oils with a high proportion of linolenic acid, e.g. , linseed oil. The results of G.L.P.C. are considered to be accurate to within one unit percentage. Thermal stability of the polyester polymers can be improved by using 1,4‐butanediol or ethylene glycol as the polyols instead of diethylene glycol.