Device for the chromatographic analysis of trace matter in gas

摘要

Resolution and sensitivity of an apparatus for gas chromatography with a separation column (1) with the detector (2) in a gas line with sample inlet system (6) and means for a regulated gas flow through the column (1) can be improved by one of the separation column upstream fractionation column (4) and leads (13, 14) for two durchflußgleiche carrier gas streams I and II is rinsed in opposite direction to the analysis phase with carrier gas II with means for switching operation between (a) a sample inlet phase in which filled the sample inlet system while maintaining the fractionating column (4), while by the separation column (1), a controlled flow of carrier gas I is maintained, and (B) an analysis phase, in which the sample to the fractionating column (4) and then to the separation column (1) is transferred, wherein in step (e) (initially the outlet 16 , 17) opens at the outlet of the fractionating column (4) until the lowest-volatile components from the System are removed.