{
  "url": "https://openlegislation.uk/eu-regulation-2017-644/annex-IV/division-2",
  "json_url": "https://openlegislation.uk/eu-regulation-2017-644/annex-IV/division-2.json",
  "legislation": "eur/2017/644",
  "legislation_title": "Commission Regulation (EU) 2017/644 of 5 April 2017 laying down methods of sampling and analysis for the control of levels of dioxins, dioxin-like PCBs and non-dioxin-like PCBs in certain foodstuffs and repealing Regulation (EU) No 589/2014 (Text with EEA relevance)",
  "legislation_url": "https://openlegislation.uk/eu-regulation-2017-644",
  "path": "annex/IV/division/2",
  "kind": "division",
  "number": "2",
  "heading": "Identification and confirmation of analytes of interest:",
  "text": "Relative retention time in relation to internal standards or reference standards (acceptable deviation of +/– 0,25 %).\nGas chromatographic separation of the non-dioxin-like PCBs (from interfering substances, especially co-eluting PCBs, in particular if levels of samples are in the range of legal limits and non-compliance is to be confirmed).\nFor GC-MS techniques:\nMonitoring of at least the following number of molecular ions or characteristic ions from the molecular cluster:\ntwo specific ions for HRMS,\nthree specific ions for LRMS,\ntwo specific precursor ions, each with one specific corresponding transition product ion for MS-MS.\nMaximum permitted tolerances for abundance ratios for selected mass fragments:\nRelative deviation of abundance ratio of selected mass fragments from theoretical abundance or calibration standard for target ion (most abundant ion monitored) and qualifier ion(s): ± 15 %.\nFor GC-ECD:\nConfirmation of results exceeding the maximum level with two GC columns with stationary phases of different polarity.",
  "extent": "E+W+S+N.I.",
  "status": null,
  "version": "current",
  "annotations": [
    {
      "type": "footnote",
      "label": "f1",
      "text": "Congeners often found to co-elute are, e.g. PCB 28/31, PCB 52/69 and PCB 138/163/164. For GC-MS also possible interferences from fragments of higher chlorinated congeners have to be considered."
    }
  ],
  "outstanding_effects": [],
  "provenance": {
    "source": "legislation.gov.uk",
    "source_url": "https://www.legislation.gov.uk/eur/2017/644/annex/IV/division/2",
    "retrieved_at": "2026-11-01T14:45:03.439389+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."
}