Particle concentration

{
  "id": "MLC-T-CHM-013374",
  "term": "Particle concentration",
  "field": "Chemistry",
  "definition": "The amount of airborne particulate matter per unit volume of air, expressed either as mass concentration, usually in micrograms per cubic metre, or as number concentration, in particles per cubic centimetre. Size-resolved instruments report the number or mass in each diameter range as well as the total. In atmospheric aerosol, most of the particle number lies below 0.1 micrometre in diameter, whereas most of the mass lies in larger particles.",
  "subject": "Chemistry and the Environment",
  "see_also": [
    "aerosol",
    "number density"
  ],
  "references": [
    "PAC, 1990, 62, 2167. 'Glossary of atmospheric chemistry terms (Recommendations 1990)' on page 2181 (https://doi.org/10.1351/pac199062112167)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/particle-concentration/"
}