# Commission Regulation (EC) No 152/2009 of 27 January 2009 laying down the methods of sampling and analysis for the official control of feed (Text with EEA relevance), Division 8: Results of a collaborative study

Extent: E+W+S+N.I.

A collaborative study was arranged in which 6 feed, 4 premixtures and 3 preparations were analysed by 8 laboratories. Duplicate analyses were performed on each sample. (More detailed information on this collaborative study can be found in the Journal of the AOAC, Volume 71, 1988, p. 484-490). The results (excluding outliers) are shown below:
Table 1
Results of the collaborative study for feed
Sample 1
Sample 2
Sample 3
Sample 4
Sample 5
Sample 6
L
8
8
8
8
8
8
n
15
14
15
15
15
15
Mean (mg/kg)
50,0
47,6
48,2
49,7
46,9
49,7
Sr (mg/kg)
2,9
2,69
1,38
1,55
1,52
2,12
CVr (%)
5,8
5,6
2,9
3,1
3,2
4,3
SR (mg/kg)
3,92
4,13
2,23
2,58
2,26
2,44
CVR (%)
7,8
8,7
4,6
5,2
4,8
4,9
Nominal content (mg/kg)
50,0
50,0
50,0
50,0
50,0
50,0
Table 2
Results of the collaborative study for premixtures and preparations
Premixtures
Preparations
A
B
C
D
A
B
C
L
7
7
7
7
8
8
8
n
14
14
14
14
16
16
16
Mean (g/kg)
8,89
9,29
9,21
8,76
94,6
98,1
104
Sr (g/kg)
0,37
0,28
0,28
0,44
4,1
5,1
7,7
CVr (%)
4,2
3,0
3,0
5,0
4,3
5,2
7,4
SR (g/kg)
0,37
0,28
0,4
0,55
5,4
6,4
7,7
CVR (%)
4,2
3,0
4,3
6,3
5,7
6,5
7,4
Nominal content (g/kg)
10,0
10,0
10,0
10,0
100
100
100
Lnumber of laboratories
nnumber of single values
Srstandard deviation of repeatability
CVrcoefficient of variation of repeatability
SRstandard deviation of reproducibility
CVRcoefficient of variation of reproducibility.

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Source: https://www.legislation.gov.uk/eur/2009/152/annex/VIII/division/D/division/8 (the official version)
Page: https://openlegislation.uk/eu-regulation-2009-152/annex-VIII/division-D/division-8
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.