{
  "url": "https://openlegislation.uk/eu-regulation-1991-2568/annex-IV/division-5/division-5.2/division-5.2.2",
  "json_url": "https://openlegislation.uk/eu-regulation-1991-2568/annex-IV/division-5/division-5.2/division-5.2.2.json",
  "legislation": "eur/1991/2568",
  "legislation_title": "Commission Regulation (EEC) No 2568/91 of 11 July 1991 on the characteristics of olive oil and olive-residue oil and on the relevant methods of analysis",
  "legislation_url": "https://openlegislation.uk/eu-regulation-1991-2568",
  "path": "annex/IV/division/5/division/5.2/division/5.2.2",
  "kind": "division",
  "number": "5.2.2",
  "heading": "Choice of operating conditions",
  "text": "The operating conditions are generally as follows:\ncolumn temperature:\n20 °C/minute\n5 °C/minute\n20 °C/minute\nInitially 80 °C\n(1′)\n→\n240 °C\n→\n325 °C\n(6′)\n→\n340 °C\n(10′)\ndetector temperature: 350 °C;\nquantity of substance injected: 1 μl of the n-heptane solution (2-4 ml);\ncarrier gas: helium or hydrogen at the correct linear velocity for the gas selected (see Appendix);\ninstrument sensitivity: suitable for the following conditions:\nThe conditions may be modified according to the characteristics of the column and the GC apparatus to obtain separation of all the waxes and a satisfactory peak resolution (see figure); the internal standard C 32 retention time must be 18 ± 3 minutes. The most representative wax peak must be at least 60 % of the full scale.\nThe peak integration parameters must be established so as to obtain a correct evaluation of the areas of the peaks in question.",
  "extent": "E+W+S+N.I.",
  "status": null,
  "version": "current",
  "annotations": [
    {
      "type": "F",
      "label": "F1",
      "text": "Substituted by Commission Regulation (EC) No 702/2007 of 21 June 2007 amending Commission Regulation (EEC) No 2568/91 on the characteristics of olive oil and olive-residue oil and on the relevant methods of analysis."
    }
  ],
  "outstanding_effects": [],
  "provenance": {
    "source": "legislation.gov.uk",
    "source_url": "https://www.legislation.gov.uk/eur/1991/2568/annex/IV/division/5/division/5.2/division/5.2.2",
    "retrieved_at": "2026-11-01T15:01:50.986318+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."
}