Bestimmung leichtflüchtiger Chlorkohlenwasserstoffe in Luft durch Head-Space-Analytik

Summary

The chlorinated hydrocarbons trichloromethane and tetrachloromethane, trichloroethene and perchloroethene as well as, with restrictions, 1,1,1-trichloroethane and other CHC compounds can be determined in air samples in a simple way. Problems may arise owing to the fact that components of the sealing capsules indicate CHC (e.g., perchloroethene), and/or the specimen bottles have not been encapsulated densely enough to ensure absolute airtightness. The sensitivity of the procedure can be increased to such an extent that the four above-mentioned substances are practically detectable everywhere. The values measured for Coblenz in 1983 reached about 1–150 μ/m³ for tetrachloromethane, <10–350 μ/m³ for trichloroethene, and <1–220 μ/m³ for perchloroethene.