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This report reviews the literature for alternatives to a simple index based on butyric acid to determine the milk fat content of fats. It notes that in the case of pure milk fat it is possible to detect small quantities of added fat by formulae which are based on the use of linear combinations of their triglyceride contents. Research which has also been carried out using linear discriminant analysis of fatty acid methyl esters is reported. In the case of admixture of non milk fats with milk fat a number of different approaches which have been found successful in particular cases are considered, however a general method which is applicable in all cases has been found. The report also reviews recent literature on butyric acid contents to verify if the exiting indices are correct. It notes that a more appropriate index for converting methyl butyrate to milk fat content would be 25.

Additional information

Authors: NANGLE M, State Laboratory, Dublin (IE);MONGEY K, State Laboratory, Dublin (IE)
Bibliographic Reference: EUR 17800 EN (1997) 26pp., FS, free of charge
Availability: Available from the DG XII Documentation Centre, European Commission, 200 rue de la Loi, B-1049 Bruxelles (BE), Fax: +32-2-2969823
ISBN: ISBN 92-828-0991-9
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