Abstract
The integrating sphere method is used for determination of the total mass concentration of soot in the atmospheric aerosols. The method is based on the definition of the photoabsorption coefficient of aerosol samples at λ = 0.55 μ. These optical measurements supplemented with the parallel chemical analysis allow the evaluation of the soot mass concentration for regions of different types (urban, rural, arid and sea). The soot concentration is show to vary from 0.03 μ g/c.m. (sea salt aerosols) to 60 - 70 mg/c.m. for industrial urban zones. Soot contributes into the total mass of submicron aerosols from 0.07% to 40% respectively. Some evidences are given in favour of the fact that soot presents in submicron particles as tiny disperse inclusions rather than a separate aerosol fraction.
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