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31P nuclear magnetic resonance spectra of milk from various species

Published online by Cambridge University Press:  01 June 2009

Peter S. Belton  and
Richard L. J. Lyster
Peter S. Belton
Affiliation:
AFRC Institute of Food Research, Norwich Laboratory, Colney Lane, Norwich NR4 7UA, UK
Richard L. J. Lyster
Affiliation:
Food Studies Building, Whiteknights, PO Box 226, University of Reading, Reading RG6 9AP, UK
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Summary

The 31P nuclear magnetic resonance spectra of milk from goats, sheep, a rabbit, a baboon and a human were examined and compared with the spectrum of cows' milk. Most of the peaks observed could be assigned to phosphorus compounds already known to be present in such milks. However, rabbit milk was found to contain unexpectedly large amounts of phosphate esters, and to have only low levels of alkaline phosphatase (EC 3.1.3.1) activity. In addition, an unknown compound was detected in baboon milk and in some samples of sheep and goat colostrum. This compound was not identified, but may be a mixed anhydride such as 1,3 diphosphoglyceric acid. The results show that changes during lactation may be followed by 31P nuclear magnetic resonance and that the technique may be of value in authentification of samples.

Type
Original Articles
Information
Journal of Dairy Research , Volume 58 , Issue 4 , November 1991 , pp. 443 - 451
Copyright
Copyright © Proprietors of Journal of Dairy Research 1991

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