Metering device for gas chromatography

摘要

Metering device for gas chromatography having a multi-way metering valve (DV) with connections (a1 to a6) for sample gas, carrier gas, separation column and a metering volume (D). In the filling position, a fill volume (F) about one to three powers of ten larger than the metering volume (D) (metering loop) is arranged upstream of the metering volume, the fill volume being able to be connected alternately to the sample gas source (PQ) at subatmospheric pressure, a carrier gas source (TQ) at superatmospheric pressure and a vacuum pump (P). The invention is used in gas chromatography, in particular laboratory gas chromatography. <IMAGE>