# Commission Decision of 12 August 2002 implementing Council Directive 96/23/EC concerning the performance of analytical methods and the interpretation of results (notified under document number C(2002) 3044) (Text with EEA relevance) (2002/657/EC), Division 2.3.2.1: Trueness of quantitative methods

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

In the case of repeated analyses of a certified reference material, the guideline ranges for the deviation of the experimentally determined recovery corrected mean mass fraction from the certified value are as follows:
Table 2
Minimum trueness of quantitative methods
Mass fraction
Range
≤ 1 μg/kg
– 50 % to + 20 %
> 1 μg/kg to 10 μg/kg
– 30 % to + 10 %
≥ 10 μg/kg
– 20 % to + 10 %
When no such CRMs are available, it is acceptable that trueness of measurements is assessed through recovery of additions of known amounts of the analyte(s) to a blank matrix. Data corrected with the mean recovery are only acceptable when they fall within the ranges shown in Table 2.

---
Source: https://www.legislation.gov.uk/eudn/2002/657/annex/chapter/2.3/division/2.3.2.1 (the official version)
Page: https://openlegislation.uk/eu-decision-2002-657/annex/chapter-2.3/division-2.3.2.1
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.