{
  "url": "https://openlegislation.uk/eu-decision-2002-657/annex/chapter-3.1/division-3.1.2.2",
  "json_url": "https://openlegislation.uk/eu-decision-2002-657/annex/chapter-3.1/division-3.1.2.2.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/3.1/division/3.1.2.2",
  "kind": "division",
  "number": "3.1.2.2",
  "heading": "Repeatability",
  "text": "Prepare a set of samples of identical matrices, fortified with the analyte to yield concentrations equivalent to 1, 1,5 and 2 times the minimum required performance limit or 0,5, 1 and 1,5 times the permitted limit.\nAt each level the analysis should be performed with at least six replicates.\nAnalyse the samples.\nCalculate the concentration detected in each sample.\nFind the mean concentration, standard deviation and the coefficient of variation (%) of the fortified samples.\nRepeat these steps on at least two other occasions.\nCalculate the overall mean concentrations and CVs for the fortified samples.",
  "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/3.1/division/3.1.2.2",
    "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."
}