{
  "url": "https://openlegislation.uk/fertilisers-sampling-and-analysis-regulations-northern-ireland-1996/schedule-2/part-I/chapter-21./paragraph-4",
  "json_url": "https://openlegislation.uk/fertilisers-sampling-and-analysis-regulations-northern-ireland-1996/schedule-2/part-I/chapter-21./paragraph-4.json",
  "legislation": "nisr/1996/513",
  "legislation_title": "Fertilisers (Sampling and Analysis) Regulations (Northern Ireland) 1996",
  "legislation_url": "https://openlegislation.uk/fertilisers-sampling-and-analysis-regulations-northern-ireland-1996",
  "path": "schedule/2/part/I/chapter/21./paragraph/4",
  "kind": "paragraph",
  "number": "4",
  "heading": "REAGENTS",
  "text": "4.1 Hydrochloric acid, 1 M solution.\n4.2 Hydrochloric acid, 0.5 M solution.\n4.3 Standard solution of magnesium, 1.00 mg per ml.\n4.3.1 Dissolve 1.013 g of magnesium sulfate (MgSO4.7H2O) in 0.5 M in hydrochloric acid solution (4.2).\nor:\n4.3.2 Weigh out 1.658 g of magnesium oxide (MgO), previously ashed to removed all traces of carbonate. Place in a beaker with 100 ml of water and 120 ml of 1 M hydrochloric acid (4.1). When it has dissolved, transfer quantitatively into a 1 litre graduated flask. Make up to the volume and mix.\nor:\n4.3.3 Commercial standard solution.\nThe laboratory is responsible for testing such solutions.\n4.4 Strontium chloride solution.\nDissolve 75 g of strontium chloride (SrCl26H2O) in the hydrochloric acid solution (4.2) and make up to 500 ml with the same acid solution.",
  "extent": null,
  "status": null,
  "version": "current",
  "annotations": [],
  "outstanding_effects": [],
  "provenance": {
    "source": "legislation.gov.uk",
    "source_url": "https://www.legislation.gov.uk/nisr/1996/513/schedule/2/part/I/chapter/21./paragraph/4",
    "retrieved_at": "2026-10-29T02:32:40.012993+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."
}