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Measurement of the protein content of milk from mastitic quarters by the Amido Black method

Published online by Cambridge University Press:  01 June 2009

R. Waite  and
G. M. Smith
R. Waite
Affiliation:
Hannah Research Institute, Ayr, Scotland KA6 5HL
G. M. Smith
Affiliation:
Scottish Milk Marketing Board, Glasgow KA6 5HL
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Summary

An investigation was made into the effect of subclinical mastitis on the accuracy of the Amido Black method for measuring the crude-protein percentage of the milk of individual cows. Values obtained by the dye-binding and Kjeldahl methods on a sample of milk from each quarter of 46 cows, 11 of which were sampled at regular intervals during lactation, were compared. It was concluded that, even in cases of severe subclinical mastitis, the effect is so small as to constitute no objection to the use of the dye-binding method. The accuracy of the Amido Black method, irrespective of disease, was less in milk produced in the first and last months of lactation.

Type
Research Article
Information
Journal of Dairy Research , Volume 39 , Issue 2 , June 1972 , pp. 195 - 201
Copyright
Copyright © Proprietors of Journal of Dairy Research 1972

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References

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