{
  "url": "https://openlegislation.uk/eu-decision-2002-657/annex/chapter-2.3/division-2.3.6",
  "json_url": "https://openlegislation.uk/eu-decision-2002-657/annex/chapter-2.3/division-2.3.6.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/2.3.6",
  "kind": "division",
  "number": "2.3.6",
  "heading": "Performance criteria and other requirements for the determination of an analyte by 2-D TLC coupled to full-scan UV/VIS spectrometric detection",
  "text": "Two-dimensional HPTLC and co-chromatography are mandatory.\nThe RF values of the analyte shall agree with the RF values of the standards within ±5 %.\nThe visual appearance of the analyte shall be indistinguishable from that of the standard.\nFor spots of the same colour the centre of the nearest spot should be shall separated from the centre of the spot of the analyte by at least half the sum of the spot diameters.\nThe spectrum of the analyte shall not be visually different from the spectrum of the standard, as described for full-scan UV/VIS detection.\nIn the case computer-aided library searching and matching are used, the comparison of the spectral data in the test samples to that of the calibration solution has to exceed a critical match factor. This factor shall be determined during the validation process for every analyte on the basis of spectra for which the criteria described above are fulfilled. Variability in the spectra caused by the sample matrix and the detector performance shall be checked.",
  "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/2.3.6",
    "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."
}