J. Anim Sci.
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J. Anim Sci. 1976. 42:67-71.
© 1976 American Society of Animal Science
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A Comparative Evaluation of Rapid Methods for Determining Fat Content of Ground Beef

E. P. Young1, A. W. Kotula2 and G. G. Twigg1

U.S. Department of Agriculture, Beltsville, Maryland 20705

Abstract

Fat in 52 ground beef samples (5.9 kg) determined by the Anyl-ray, Univex, Hobart, Honeywell, Bligh and Dyer, and Soxhlet procedures, ranged between 15 and 32%. The mean fat content of all samples determined by Anyl-ray was 23.29%. The standard error for this method was not calculated because each sample was measured only once. Means of three observations per sample for the other methods in the order listed above were 23.14, 22.24, 23.81, 25.10 and 25.02%, respectively. The among-section error, which describes the nonhomogeneity within the 5.9 kg sample, as determined by fat analysis of subsamples selected from three different sections of the total sample and expressed as coefficient of variation ranged from 2.94 to 5.45%. The within-section errors for fat determinations by Bligh and Dyer and Soxhlet of subsamples from within the same sections were 2.92 and 3.42%, respectively. Correlation coefficients between methods ranged from .87 for Anyl-ray with Univex to .96 for Soxhlet with Bligh and Dyer.

Footnotes

1 Department of Animal Science, University of Maryland, College Park 20742.

2 A.R.S., Meat Science Research Laboratory.






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Copyright © 1976 by the American Society of Animal Science.