{
  "url": "https://openlegislation.uk/eu-decision-2002-657/annex/chapter-2.3/division-2.3.2.1",
  "json_url": "https://openlegislation.uk/eu-decision-2002-657/annex/chapter-2.3/division-2.3.2.1.json",
  "legislation": "eudn/2002/657",
  "legislation_title": "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)",
  "legislation_url": "https://openlegislation.uk/eu-decision-2002-657",
  "path": "annex/chapter/2.3/division/2.3.2.1",
  "kind": "division",
  "number": "2.3.2.1",
  "heading": "Trueness of quantitative methods",
  "text": "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:\nTable 2\nMinimum trueness of quantitative methods\nMass fraction\nRange\n≤ 1 μg/kg\n– 50 % to + 20 %\n> 1 μg/kg to 10 μg/kg\n– 30 % to + 10 %\n≥ 10 μg/kg\n– 20 % to + 10 %\nWhen 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.",
  "extent": "E+W+S+N.I.",
  "status": null,
  "version": "current",
  "annotations": [],
  "outstanding_effects": [],
  "provenance": {
    "source": "legislation.gov.uk",
    "source_url": "https://www.legislation.gov.uk/eudn/2002/657/annex/chapter/2.3/division/2.3.2.1",
    "retrieved_at": "2026-11-01T15:18:31.211349+00:00"
  },
  "licence": "Open Government Licence v3.0",
  "licence_url": "https://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/",
  "attribution": "Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives."
}