Preferred Label : particle concentration;
Detailed label : particle concentration in atmospheric chemistry;
IUPAC definition : Commonly expressed in several ways: mass concentration (usually as µg m-3) or number
concentration (number of particles cm-3); modern instrumentation allows measurement
of the number of particles as a function of size as well as the total number present
in a given air volume. For atmospheric aerosols, this is a complex distribution for
which diameters range from below 0.01 to above 100 µm; the particles making the highest
contribution to the total number density are in the size range below 0.1 µm, those
contributing most to the total surface area are in the 0.1 to 1.0 µm range, while
those with the highest contribution to the volume or mass of the aerosol come from
both the 0.1 to 1.0 µm and 1.0 to 100 µm ranges.;
Origin ID : P04423;
See also
Commonly expressed in several ways: mass concentration (usually as µg m-3) or number
concentration (number of particles cm-3); modern instrumentation allows measurement
of the number of particles as a function of size as well as the total number present
in a given air volume. For atmospheric aerosols, this is a complex distribution for
which diameters range from below 0.01 to above 100 µm; the particles making the highest
contribution to the total number density are in the size range below 0.1 µm, those
contributing most to the total surface area are in the 0.1 to 1.0 µm range, while
those with the highest contribution to the volume or mass of the aerosol come from
both the 0.1 to 1.0 µm and 1.0 to 100 µm ranges.
