Coning and quartering

{
  "id": "MLC-T-CHM-002436",
  "term": "Coning and quartering",
  "field": "Chemistry",
  "definition": "A manual method for reducing the size of a bulk solid sample while maintaining its representativeness. The material is first formed into a cone, then flattened, and divided into four equal quarters. Two opposite quarters are discarded, and the remaining two are combined and re-coned, repeating the process until a suitable sample size is achieved.",
  "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/coning-and-quartering/"
}