{
  "url": "https://openlegislation.uk/preservatives-in-food-regulations-1989/schedule-5/part-II/paragraph-6",
  "json_url": "https://openlegislation.uk/preservatives-in-food-regulations-1989/schedule-5/part-II/paragraph-6.json",
  "legislation": "uksi/1989/533",
  "legislation_title": "The Preservatives in Food Regulations 1989",
  "legislation_url": "https://openlegislation.uk/preservatives-in-food-regulations-1989",
  "path": "schedule/5/part/II/paragraph/6",
  "kind": "paragraph",
  "number": "6",
  "heading": "Calculation of results",
  "text": "A standard curve is drawn, plotting the biphenyl values of 30, 50 and 70 μg. against the corresponding absorptions, as determined on the spectrophotometer. This gives a straight line which passes through the origin. This graph allows the biphenyl content of the samples to be read directly in mg. per kg. from the absorption value of their extracts.",
  "extent": null,
  "status": null,
  "version": "current",
  "annotations": [],
  "outstanding_effects": [],
  "provenance": {
    "source": "legislation.gov.uk",
    "source_url": "https://www.legislation.gov.uk/uksi/1989/533/schedule/5/part/II/paragraph/6",
    "retrieved_at": "2026-10-29T15:46:33.935266+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."
}