Preferred Label : smog chamber;
Detailed label : smog chamber in atmospheric chemistry;
IUPAC definition : A large confined volume in which sunlight or simulated sunlight is allowed to irradiate
air mixtures of atmospheric trace gases (hydrocarbons, nitrogen oxides, sulfur dioxide,
etc.) which undergo oxidation. In theory these chambers allow the controlled study
of complex reactions which occur in the atmosphere. However, ill-defined wall reactions
which generate some molecular and radical species (e.g. HONO, CH sub 2 /sub O, HO-radicals,
etc.) and remove certain products (H sub 2 /sub O sub 2 /sub , HNO sub 3 /sub , etc.),
the use of reactant concentrations well above those in the atmosphere, ill-defined
light intensities and wavelength distribution within the chamber, and other factors
peculiar to chamber experiments require that caution be exercised in the extrapolation
of results obtained from them to atmospheric systems.;
Origin ID : S05717;
See also
A large confined volume in which sunlight or simulated sunlight is allowed to irradiate
air mixtures of atmospheric trace gases (hydrocarbons, nitrogen oxides, sulfur dioxide,
etc.) which undergo oxidation. In theory these chambers allow the controlled study
of complex reactions which occur in the atmosphere. However, ill-defined wall reactions
which generate some molecular and radical species (e.g. HONO, CH sub 2 /sub O, HO-radicals,
etc.) and remove certain products (H sub 2 /sub O sub 2 /sub , HNO sub 3 /sub , etc.),
the use of reactant concentrations well above those in the atmosphere, ill-defined
light intensities and wavelength distribution within the chamber, and other factors
peculiar to chamber experiments require that caution be exercised in the extrapolation
of results obtained from them to atmospheric systems.
