Original scientific paper
LONG-TERM MONITORING OF HOMOGENEITY OF COMPOUND FEED IN THE GOVERNMENT SUPERVISION
Slawomir Walczynski
; National Research Institute of Animal Production, Lublin, Poland
Waldemar Korol
; National Research Institute of Animal Production, Lublin, Poland
Abstract
The paper presents instruction concerning homogeneity evaluation of
compound feed based on the level of the key component (chloride or
calcium) mixture, which was elaborated in the National Research Institute of Animal Production, National Feed Laboratory (NFL) in Lublin. The instruction was accepted by competent authority and was verified at interlaboratory comparisons ILC from 2005 to 2007. Several licensed laboratories took part in the investigations project in the frame of official supervision as well as reference laboratory – NFL. The laboratories determined the calcium and chlorides content in samples of serial feed mixtures. Feeds were estimated for poultry, pigs and cattle in the form of powder, granules and crumbles. All laboratories achieved results of mixing levels (coefficient of variation) below 10%, which is a critical value. Mean values of coefficient of variation of results were not higher than 4% for
chlorides and 3% for calcium. Expanded uncertainty was estimated.
Competence of laboratories participating in the testing and referring to the legal control of compound feed homogeneity was confirmed. A research homogeneity program for compound feed was conducted in Poland from 2006 to 2007. Inspection results confirmed acceptable quality of compound feed in this scope.
Keywords
inter-laboratory comparison; compound feed; homogeneity
Hrčak ID:
32737
URI
Publication date:
18.2.2009.
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