[The development of a methodological approach to evaluating the operating efficiency of a system for purifying the atmosphere of harmful trace contaminants].

There has been developed an approach to evaluate an efficiency of the system to purify the atmosphere from the harmful microimpurities (HMI). The methodical approach allows one to isolate 1-2 representatives of each subgroup from the total number of HMIs divided into 12 subgroups in such a way that the determination of the concentration of these compounds would be an indicator of an efficiency of removing all the representatives of a given subgroup. On selecting the representatives there have been took into consideration the values of maximally permissible concentrations of the compounds, the rate of their isolation and the possibility of an effective removal. Data of different authors published in the press have been used.