coalescence of some particles. Due to the
action of the gravitation and centrifugal
forces, as well as the temperature gradient,
some components are deposited on the
smoked goods, in the smoke ducts, and on
the walls of the smokehouse. This leads to
changes in their concentration in the smoke.
The surface electrical charge of the particles
also contributes to the physicochemical state
of the aerosol. The dispersed components
absorb and disperse light; thus their concentration
affects the optical density of the
smoke. The optical density is proportional to
the number of particles in a unit volume of
the smoke. In constant conditions, when the
dimensions of the particles do not change, the
optical density is correlated to the mass concentration
of the dispersed components in the
smoke. Thus photo optical measurements can
be used for the determination of smoke
density, which refl ects the contents of all
components.