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Journal of Dairy Science Vol. 69 No. 7 1787-1792
© 1986 by American Dairy Science Association ®
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Determination of Individual Free Fatty Acids in Milk by Strong Anion-Exchange Resin and Gas Chromatography

Å. Spangelo, Ø. Karijord, A. Svensen1 and R. K. Abrahamsen2

Department of Dairy and Food Industries, Agricultural University of Norway, P.O.B. 36, N-1432 Ås-NLH, Norway

ABSTRACT

A quantitative method for determination of free fatty acids in milk is described. Free fatty acids and some glycerides were extracted from milk in acetonitrile in the presence of sulfuric acid and anhydrous sodium sulfate. The filtered extract was evaporated to dryness. With use of strong anion-exchange resin as heterogenous basic catalysts, the free fatty acids were methylated directly. The free fatty acids were separated by gas chromatography with a 2000 mm x 2-mm inner diameter glass column packed with 10% SP-2330 on 100/120 mesh Chromosorb W.

FOOTNOTES

1 Chemical Analytical Laboratory, Agricultural University of Norway, P.O.B. 31, N-1432 Ås-NLH, Norway.

2 Corresponding author.






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Copyright © 1986 by the American Dairy Science Association ®.