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The composition of milk. Part II: Variation in the percentage of mineral constituents in cow’s milk, and their relationship with the solids not fat and protein content

Published online by Cambridge University Press:  27 March 2009

H. T. Cranfield ,
D. G. Griffiths  and
E. R. Ling
H. T. Cranfield
Affiliation:
Midland Agricultural College, Sutton Bonington, Loughborotigh.
D. G. Griffiths
Affiliation:
Midland Agricultural College, Sutton Bonington, Loughborotigh.
E. R. Ling
Affiliation:
Midland Agricultural College, Sutton Bonington, Loughborotigh.
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Extract

1. 670 samples of the mixed milk from 15 herds were analysed, and the average percentages of total ash, soluble ash, insoluble ash, lime and phosphoric acid are given.

2. Tables showing frequency distributions are also given, with the standard deviation, mean and probable error of mean for each constituent determined.

3. Various correlations of these constituents with solids not fat and protein have been prepared, and these correlations are illustrated by graphs.

It is observed that the total ash falls with the solids not fat until low values of solids not fat are reached, when the ash content appears to rise. This variation is confirmed by a curve illustrating the variation in ash content of samples of individual cow’s milk. Soluble ash rises as the solids not fat falls, but the insoluble ash shows a reverse variation. Lime and phosphoric acid both fall with the solids not fat.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 17 , Issue 1 , January 1927 , pp. 72 - 93
Copyright
Copyright © Cambridge University Press 1927

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References

REFERENCES

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