Division 8 Results of a collaborative study
United Kingdom
A collaborative study was arranged in which three poultry feeds (sample 1-3), one mineral feed (sample 4) and one premix (sample 5) were analysed. The results are given in the following table:
| Sample 1 (blank feed) | Sample 2 | Sample 3 | Sample 4 | Sample 5 | |
|---|---|---|---|---|---|
| L | 14 | 14 | 14 | 14 | 15 |
| n | 56 | 56 | 56 | 56 | 60 |
| mean [mg/kg] | — | 45,5 | 188 | 5 129 | 25 140 |
| sr [mg/kg] | — | 2,26 | 3,57 | 178 | 550 |
| CVr [%] | — | 4,95 | 1,9 | 3,46 | 2,2 |
| sR [mg/kg] | — | 2,95 | 11,8 | 266 | 760 |
| CVR [%] | — | 6,47 | 6,27 | 5,19 | 3,0 |
| nominal content [mg/kg] | — | 50 | 200 | 5 000 | 25 000 |
L
number of laboratories
number of single values
standard deviation of repeatability
coefficient of variation of repeatability
standard deviation of reproducibility
coefficient of variation of reproducibility.