Apparatus for taking samples by thermal desorption

US4849179A · kind A · utility

Assignee

• Kernforschungszentrum Karlsruhe GmbH · DE

Inventors

• Karl H. Reinhardt · Schwarzenbek, DE
• Helmut Dittmer · Leverkusen, DE
• Jurgen Gandress · Hamburg, DE

Key dates

• Filing date: May 14, 1987
• Grant date: Jul 18, 1989
• Expiry date: May 14, 2007

Classification

• Technology area (CPC G): Physics
• CPC primary: G01N2030/128
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

An apparatus for taking samples by thermal desorption of compounds that are adsorbed on solid adsorbents contained in a sample tube. An injector has a recess for accommodating the sample tube and a connection for a capillary column of a gas chromatograph. The compounds are desorbed into such capillary column by means of a stream of carrier gas passing through the sample tube. An injector extension is fastened to the injector and has a recess for accommodating the sample tube. The recess of the injector extension is flush with the recess of the injector. A push rod is guidable in the injector extension for pushing the sample tube from a position in the injector extension into a position within the injector. A carrier gas inlet communicates with the recess in the injector extension for admitting a carrier gas therein. A plug is disposed at an end of the push rod for gripping the sample tube. The plug includes a bore for effecting communication between the carrier gas inlet and the interior of the sample tube.