{
  "url": "https://openlegislation.uk/eu-directive-2004-73/annex-2I/division-C.23/division-2/division-2.1",
  "json_url": "https://openlegislation.uk/eu-directive-2004-73/annex-2I/division-C.23/division-2/division-2.1.json",
  "legislation": "eudr/2004/73",
  "legislation_title": "Commission Directive 2004/73/EC of 29 April 2004 adapting to technical progress for the twenty-ninth time Council Directive 67/548/EEC on the approximation of the laws, regulations and administrative provisions relating to the classification, packaging and labelling of dangerous substances (Text with EEA relevance)",
  "legislation_url": "https://openlegislation.uk/eu-directive-2004-73",
  "path": "annex/2I/division/C.23/division/2/division/2.1",
  "kind": "division",
  "number": "2.1",
  "heading": "TREATMENT OF RESULTS",
  "text": "The amounts of test substance, transformation products, volatile substances (in % only), and non-extractable should be given as % of applied initial concentration and, where appropriate, as mgkg-1 soil (based on soil dry weight) for each sampling interval. A mass balance should be given in percentage of the applied initial concentration for each sampling interval. A graphical presentation of the test substance concentrations against time will allow an estimation of its transformation half-life or DT50. Major transformation products should be identified and their concentrations should also be plotted against time to show their rates of formation and decline. A major transformation product is any product representing ≥ 10% of applied dose at any time during the study.\nThe volatile products trapped give some indication of the volatility potential of a test substance and its transformation products from soil.\nMore accurate determinations of half-lives or DT50 values and, if appropriate, DT75 and DT90 values should be obtained by applying appropriate kinetic model calculations. The half-life and DT50 values should be reported together with the description of the model used, the order of kinetics and the determination coefficient (r2). First order kinetics is favoured unless r2 < 0.7. If appropriate, the calculations should also be applied to the major transformation products. Examples of appropriate models are described in references 31 to 35.\nIn the case of rate studies carried out at various temperatures, the transformation rates should be described as a function of temperature within the experimental temperature range using the Arrhenius relationship of the form:\nk = A·e-B/T or lnk= ln A- B T ,\nwhere ln A and B are regression constants from the intercept and slope, respectively, of a best fit line generated from linearly regressing ln k against 1/T, k is the rate constant at temperature T and T is the temperature in Kelvin. Care should be given to the limited temperature range in which the Arrehenius relationship will be valid in case transformation is governed by microbial action.",
  "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/2004/73/annex/2I/division/C.23/division/2/division/2.1",
    "retrieved_at": "2026-11-01T15:22:47.605967+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."
}