Division 2.4.2.2 Precision of quantitative methods
United Kingdom
In the case of repeated analysis of a sample carried out under within-laboratory reproducibility conditions, the intra-laboratory coefficient of variation (CV) of the mean shall not exceed the following values:
Table 8
CVs for quantitative methods at a range of element mass fractions
| Mass fraction | CV (%) |
|---|---|
| ≥ 10 μg/kg to 100 μg/kg | 20 |
| > 100 μg/kg to 1 000 μg/kg | 15 |
| ≥ 1 000 μg/kg | 10 |