Modified sample

{
  "id": "MLC-T-CHM-007454",
  "term": "Modified sample",
  "field": "Chemistry",
  "definition": "Material drawn from the parent population, whole or as a fraction of known size, in which the analyte has been separated out or enriched before delivery to the laboratory; an example is a pollutant collected from a large volume of air on a sorbent at the sampling site. Where the same separation or enrichment happens in the laboratory instead, it belongs to the preparation of the test sample and does not create a modified sample.",
  "subject": "Analytical Chemistry",
  "see_also": [
    "laboratory sample",
    "test sample"
  ],
  "references": [
    "PAC, 1990, 62, 1193. 'Nomenclature for sampling in analytical chemistry (Recommendations 1990)' on page 1204 (https://doi.org/10.1351/pac199062061193)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/modified-sample/"
}