{
  "url": "https://openlegislation.uk/eu-regulation-1986-1764/annex/division-9/division-4/division-4.2/division-4.2.1",
  "json_url": "https://openlegislation.uk/eu-regulation-1986-1764/annex/division-9/division-4/division-4.2/division-4.2.1.json",
  "legislation": "eur/1986/1764",
  "legislation_title": "Commission Regulation (EEC) No 1764/86 of 27 May 1986 laying down minimum quality requirements for products processed from tomatoes under the production aid scheme",
  "legislation_url": "https://openlegislation.uk/eu-regulation-1986-1764",
  "path": "annex/division/9/division/4/division/4.2/division/4.2.1",
  "kind": "division",
  "number": "4.2.1",
  "heading": "Digestion in the wet stage",
  "text": "Weigh out 1 to 2 g of the homogenized sample, according to presumed quantity of calcium, into a Kjeldahl flask.\nIn the case of liquid products, weigh out 10 g and concentrate down to a reduced volume (2 to 3 ml).\nAdd 10 ml concentrated nitric acid (2.1) and 2,5 ml sulphuric acid (2.4).\nStart heating very gently until white fumes appear.\nAt that point the solution should be clear and colourless.\nIf this is not so, carefully add a few drops of nitric acid (2.1) and continue heating until white fumes appear.\nOnce destruction is complete, decant the solution which should be reduced to 2 to 3 ml into a 25 ml volumetric flask and make up to volume with double-distilled water.\nSamples prepared in this fashion are analyzed and compared with standard 10 % sulphuric acid solutions (2.4).",
  "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/eur/1986/1764/annex/division/9/division/4/division/4.2/division/4.2.1",
    "retrieved_at": "2026-11-01T15:04:59.708846+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."
}