Patent ID: 6929780

Claim:
A sample inlet and vaporizing device arrangement for capillary gas chromatography, comprising: a sample inlet chamber having an inlet-side first portion and an elongated outlet-side second portion, injection means for injection of liquid samples with easily volatile solvent into said first portion and means for supplying a carrier gas into said first portion, heating means for heating said second portion of said sample inlet chamber, a vaporizer tube for vaporizing said liquid samples, said vaporizer tube having an inlet end and an outlet end, extending longitudinally within said second portion of said inlet chamber and defining a longitudinal passage which is open along its whole length for the passage of a sample to be subjected to gas chromatography and of a carrier gas flow, said inlet end communicating with said first portion of said sample inlet chamber said passage formed with a passage area and throat means having a Venturi tube-type configuration for increasing the flow velocity of said carrier gas flow to provide reduced pressure in said throat means, so as to enhance vaporization of said volatile solvent, split outlet means at said second portion of said sample inlet chamber, and means for holding an inlet end of a capillary column to extend into said outlet end of said vaporizing tube.