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Journal of Dairy Science Vol. 61 No. 11 1634-1636
© 1978 by American Dairy Science Association ®
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Collaborative Testing among Laboratories Routinely Testing Fat and Protein in Milk1

W. Michalak, H. Cynalewska2 and H. Oczkowicz

Institute of Genetics and Animal Breeding, Research Station, Popielno, 12–222 Wejsuny, Poland

ABSTRACT

One of 19 laboratories chosen as a central lab uses a system of self observation and sends out reference and control samples to the remaining laboratories. Comparability of analyses has been improving gradually since 1974. Percentage of deviations exceeding .1% of protein was reduced from about 39% to .7%. The reduction for fat was 37% to 4.2%.

FOOTNOTES

1 Supported in part by Polish Academy of Sciences within the project 09.3.1. and in part by Polish Ministry of Agriculture.

2 The District Station for Animal Breeding, 10–044 Olsztyn, ul. Niepodleglosci 53/55, Poland.






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Copyright © 1978 by the American Dairy Science Association ®.