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Application of the hydrometric method of analysis to the estimation of solids-not-fat production

Published online by Cambridge University Press:  01 June 2009

G. M. Wallace
G. M. Wallace
Affiliation:
Massey Agricultural College, Palmerston North, University of New Zealand
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Summary

The effect of preservative tablets added to milk on its composition and density is discussed. A comparison between the S.N.F. content of 10-day composite samples of milk from individual herds after making due allowance for added preservative, and the weighted mean S.N.F. calculated on a daily basis, showed that the 10-day composite sample could be used successfully for estimating S.N.F. hydrometrically. A comparison of the weights of S.N.F. supplied when estimated by gravimetric and hydrometric methods was made for ten herds supplying a commercial plant over a period of 260 days. The mean difference was –0·14% of the gravimetrically estimated weight, S.D. 0·4, and the range was ±0·6%. The result is discussed and is considered of sufficient accuracy to justify, on a technical basis, using the hydrometric method of estimating S.N.F. for determining and, if necessary, paying for the S.N.F. supplied.

Type
Original Articles
Information
Journal of Dairy Research , Volume 29 , Issue 1 , February 1962 , pp. 11 - 19
Copyright
Copyright © Proprietors of Journal of Dairy Research 1962

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References

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