{
  "url": "https://openlegislation.uk/eu-directive-1983-514/annex/division-14/division-5/division-5.2/division-5.2.7/division-5.2.7.8",
  "json_url": "https://openlegislation.uk/eu-directive-1983-514/annex/division-14/division-5/division-5.2/division-5.2.7/division-5.2.7.8.json",
  "legislation": "eudr/1983/514",
  "legislation_title": "Third Commission Directive of 27 September 1983 on the approximation of the laws of the Member States relating to methods of analysis necessary for checking the composition of cosmetic products (83/514/EEC)",
  "legislation_url": "https://openlegislation.uk/eu-directive-1983-514",
  "path": "annex/division/14/division/5/division/5.2/division/5.2.7/division/5.2.7.8",
  "kind": "division",
  "number": "5.2.7.8",
  "heading": "The conditions of chromatography are given as a guide. They permit the achievement of a resolution ‘R’ equal to, or better than, 1,5, where:",
  "text": "R = 2 d' r 2 - r 1 W 1 + W 2 let:\nr1 and r2 retention times (in minutes),\nW1 and W2 peak widths at half height (in millimetres),\nd' the chart speed (in millimetres per minute).\nIt is recommended that chromatography be terminated by regulating the tempera-ture from 90 to 150 oC at a rate of 10 oC per minute so as to eliminate substances liable to interfere with subsequent measurements.",
  "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/eudr/1983/514/annex/division/14/division/5/division/5.2/division/5.2.7/division/5.2.7.8",
    "retrieved_at": "2026-11-01T15:23:36.810601+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."
}