NEW METHOD FOR DETERMINATION OF PROTEIN CONTENT OF GOAT'S MILK AND COMPARED WITH DIFFERENT METHODS

Document Type : Original Article

Authors

1 Dairy Dept. , Fac. of Agric. Mansoura Univ., Egypt.

2 Dairy Chem. Dept., Anim. Prod. Res. Inst.

Abstract

A total of 45 samples of goats milk were collected during the milk production season to estimate %protein by Kjeldahl method and also as much as formol number. All samples were analyzed and correlation coefficient between the results was calculated to get a constant factor from which we can estimate protein content by formol titration method directly.
                The calculated factor was 2.505 and the suggested concluded equation for protein determination was as follows: Protein content (%) = 2.505 x formol No – 0.114. However, the differences when applying such equation and Kjeldahl method were statistically insignificant.  Protein content (%) by Kjeldahl method (A) differed significantly from that given by Milkoscan method (B) as shown in the following equation: A = 1.2008 x B – 0.4428

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