{
  "url": "https://openlegislation.uk/fertilisers-sampling-and-analysis-regulations-northern-ireland-1996/schedule-2/part-II/chapter-4./paragraph-3",
  "json_url": "https://openlegislation.uk/fertilisers-sampling-and-analysis-regulations-northern-ireland-1996/schedule-2/part-II/chapter-4./paragraph-3.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/II/chapter/4./paragraph/3",
  "kind": "paragraph",
  "number": "3",
  "heading": "REAGENTS",
  "text": "3.1 Activated charcoal.\nCarrez solution I:\n3.2 dissolve 21.9 g zinc acetate dihydrate in water, add 3 ml glacial acetic acid and dilute to 100 ml with water.\nCarrez solution II:\n3.3 10.6 g potassium ferrocyanide per 100 ml.\n3.4 Hydrochloric acid solution, 0.02 M.\n3.5 Sodium acetate solution, 136 g sodium acetate trihydrate per litre.\n4-dimethylaminobenzaldehyde solution:\n3.6 dissolve 1.6 g of 4-dimethylaminobenzaldehyde (4-DMAB) in 100 ml 96% ethanol and add 10 ml of hydrochloric acid (ρ = 1.18 g/ml).\n3.7 Urea standard solution: 1.0 g per 100 ml (1 ml of this solution = 10 mg urea).",
  "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/II/chapter/4./paragraph/3",
    "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."
}