FIELD: concentration of ethylene diamine, β-oxyethylethylene diamine, and N,N′-bis-β-oxyethylethylene diamine from working area atmosphere of plants producing new surface-active substances: amidastate "O", cyclimide, and amidobetaine. SUBSTANCE: method involves use of fibrous chemosorbent filter. Air is drawn through it at a rate of 1-25 l/min. Analyzed substance is extracted from filter by means of 0.005 n solution of sulfuric acid. Air sampled for analyses for ethylene diamine content is drawn at a rate of 1-10 l/min. In sampling air for analysis for b-oxyethylethylene diamine content, air is drawn at a rate of 25 l/min. In sampling air for its analysis for N,N′-bis-β-oxyethylethylene diamine content, air is drawn at a rate of 20 l/min. EFFECT: facilitated procedure. 4 cl, 3 tbl
