# Commission Regulation (EC) No 121/2008 of 11 February 2008 laying down the method of analysis for the determination of starch content in preparations of a kind used in animal feeding (CN code 2309), Division 8.4: Results of inter-laboratory test

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

An inter-laboratory test was carried out in 2005 and 2006 with participation of the European Customs laboratories. This test was performed in accordance with ISO 5725 and the IUPAC protocol (W. Horwitz, Pure and Applied Chemistry, vol. 67, 1995, p. 331-343). The precision data are given in the table below.
Statistical results of the inter-laboratory study
Samples
1 dry dog food
2 dry cat food
3 dry cat food (sample 2) with addition of starch
4 dry cat food (sample 2) with addition of beet pulp
5 commercial pet food
Sample
1
2
3
4
5
Number of laboratories after eliminating outliers
25
26
26
25
24
Number of accepted results
50
52
52
50
48
Mean starch content (%, m/m)
31,2
14,4
25,1
12,9
27,8
Repeatability standard deviation sr(%, m/m)
0,4
0,3
0,6
0,2
0,3
Repeatability limit r (%, m/m)
1,1
0,8
1,7
0,7
0,9
Reproducibility standard deviation sR(%, m/m)
1,7
0,8
1,7
0,9
1,3
Reproducibility limit R (%, m/m)
4,8
2,2
4,7
2,5
3,7

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Source: https://www.legislation.gov.uk/eur/2008/121/annex/division/8/division/8.4 (the official version)
Page: https://openlegislation.uk/eu-regulation-2008-121/annex/division-8/division-8.4
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.