Impaction

{
  "id": "MLC-T-CHM-005721",
  "term": "Impaction",
  "field": "Chemistry",
  "definition": "The process by which airborne particles, due to their inertia, deviate from the flow of a gas stream and deposit onto a surface. This occurs when the gas flow changes direction abruptly, but the particles' momentum causes them to continue in their original path. Impaction is a primary mechanism for the collection of larger aerosol particles in air sampling devices.",
  "subject": "Chemistry and the Environment",
  "references": [
    "PAC, 1990, 62, 2167. 'Glossary of atmospheric chemistry terms (Recommendations 1990)' on page 2196 (https://doi.org/10.1351/pac199062112167)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/impaction/"
}