METHOD OF CONTINUOUS ANALYSIS OF VOLATILE ORGANIC COMPOUNDS IN AN ATMOSPHERE TO BE ANALYZED AND CORRESPONDING CONCENTRATION UNIT AND CHROMATOGRAPH

摘要

Method of continuous analysis of volatile organic compounds contained in an atmosphere to be analyzed, unit for concentrating these compounds and chromatograph comprising such a unit. According to the invention, the concentration unit includes, in particular, a trap (15) consisting of an internally vitrified metal tube (16) adapted to contain a solid absorbent (35), a six-way valve (12), injection means (30a), detection means (30b) and a chromatrographic column (13). The unit further comprises electric power supply means (22) connected to the metal tube (16) and adapted to supply power capable of producing thermal energy so that the temperature gradient required for the thermodesorption of the organic compounds is obtained in at most 30 seconds.