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254. The determination of pH in milk and whey by means of colour indicator paper

Published online by Cambridge University Press:  01 June 2009

L. Seekles
L. Seekles
Affiliation:
Director, The Laboratory for Veterinary Chemistry, State UniversityUtrecht (Holland)
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Extract

Lyphan paper M 25 can be used for pH measurements in milk and whey in the pK range 5·4—6·6. As a rule the error does not exceed 0·1 pH.

In very acid milk and whey (pH < 5·4) lyphan paper of the L series may be used. Generally the deviation does not exceed -0·2 pH. In alkaline milk and whey lyphan paper cannot be used.

In milk and whey from cows infected with mastitis M 25 may be used unless the pH exceeds 7.

Type
Original Articles
Information
Journal of Dairy Research , Volume 11 , Issue 1 , January 1940 , pp. 79 - 83
Copyright
Copyright © Proprietors of Journal of Dairy Research 1940

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References

REFERENCES

(1) Aschaffenbubg, (1938). J. Dairy Res. 9, 336.CrossRefGoogle Scholar
(2) Seekles, (1936). Biochem. Z. 288, 402.Google Scholar