FIELD: analytical technique. SUBSTANCE: method for detection of impurities in gas flow provides for producing aerosol particles by condensation of vapor of high-boiling substances on molecular nuclei of condensation produced by conversion of impurity molecules. For this purpose, gas flow is exposed to electric discharge or ionizing radiation. EFFECT: higher efficiency of conversion of majority impurities in gases and applicable for nondestructive control of air fine filters used for measuring large air flows. 3 cl
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