Retention efficiency

{
  "id": "MLC-T-CHM-010288",
  "term": "Retention efficiency",
  "field": "Chemistry",
  "definition": "The fraction of the particles entering a separator, such as a filter, impactor, or cyclone, that the device holds back, usually quoted as a percentage. It is the retained quantity divided by the entering quantity and depends on particle size, so it is measured as a curve over diameter. The size at which it falls to a stated value is the cut-off of the device.",
  "subject": "Chemistry and the Environment",
  "references": [
    "PAC, 1990, 62, 2167. 'Glossary of atmospheric chemistry terms (Recommendations 1990)' on page 2211 (https://doi.org/10.1351/pac199062112167)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/retention-efficiency/"
}