Division Results of an interlaboratory test (Informative)F1
United Kingdom
An inter laboratory test was carried out in 2008 with the participation of the European Customs laboratories.
The evaluation of precision data was performed according to the ‘Protocol for the design, conduct and interpretation of method-performance studies’, W. Horwitz, (IUPAC technical report), Pure & Appl. Chem., Vol. 67, N o 2, PP.331-343, 1995.
The precision data are given in the table below.
| Samples 1 chocolate and biscuit bar 2 biscuit | Z sample 1 | Z sample 2 |
|---|---|---|
| Number of laboratories | 41 | 42 |
| Number of laboratories after eliminating outliers | 38 | 39 |
| Mean (%, m/m) | 29,8 | 55,0 |
| Repeatability standard deviation sr (%, m/m) | 0,5 | 0,5 |
| Reproducibility standard deviation sR (%, m/m) | 1,5 | 2,3 |
| Repeatability limit r (%, m/m) | 1,4 | 1,4 |
| Reproducibility limit R (%, m/m) | 4,2 | 6,6 |