Test portion

{
  "id": "MLC-T-CHM-011889",
  "term": "Test portion",
  "field": "Chemistry",
  "definition": "A specific quantity of material, precisely measured by mass or volume, that is removed from the test sample for the purpose of a single analytical determination. It is the final aliquot of material upon which the actual measurement or observation is performed. For a heterogeneous test sample, multiple test portions are analyzed to obtain a representative average value and an estimate of the variability within the sample.",
  "synonyms": [
    "analytical portion"
  ],
  "subject": "Analytical Chemistry",
  "see_also": [
    "test sample",
    "weight"
  ],
  "references": [
    "PAC, 1989, 61, 1657. 'Nomenclature for automated and mechanised analysis (Recommendations 1989)' on page 1660 (https://doi.org/10.1351/pac198961091657)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/test-portion/"
}