{
  "url": "https://openlegislation.uk/eu-directive-1983-514/annex/division-11/division-4/division-4.16",
  "json_url": "https://openlegislation.uk/eu-directive-1983-514/annex/division-11/division-4/division-4.16.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/11/division/4/division/4.16",
  "kind": "division",
  "number": "4.16",
  "heading": "Fehling's solution",
  "text": "Solution A\nWeigh 7 g of copper sulphate pentahydrate (4.5) into a 100 ml standard flask.\nDissolve in a little water. Make up to the mark with water and mix.\nSolution B\nWeigh 35 g of potassium sodium tartrate (4.6) into a 100 ml standard flask. Dissolve in 50 ml of water. Add 20 ml of sodium hydroxide (4.4). Make up to the mark with water and mix. Immediately before use, pipette 10 ml of solution A and 10 ml of solution B into a 100 ml standard flask. Make up to the mark and mix.",
  "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/11/division/4/division/4.16",
    "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."
}