ultrafine particles. (UFP) means the particle number concentrations in cm³ for a size range with a lower limit of ≤ 10 nm and for a size range with no restriction on the upper limit.
ultrafine particles. (UFP) means the particles number concentrations in with a diameter less than or equal to 100 nm; UFP are measured as the particle number concentrations per cubic centimetre (cm3) for a size range with a lower limit of ≤ [symbol deleted]10 nm and for a size range with no restriction on the upper limit;
ultrafine particles or “UFPs” means particulate matter of nanoscale size (less than 0.1 μm or 100 nm
More Definitions of ultrafine particles
ultrafine particles means particulate matter less than or equal to .1 micrometers in
ultrafine particles. (UFP) means particles with a diameter less than or equal to 100 nm, where UFP are measured as the particle number concentrations per cubic centimetre (cm3) for a size range with a lower limit of ▌10 nm and for a size range with no restriction on the upper limit;