Analyte pre-concentrator for gas chromatography
AssigneePerkinElmer Instruments LLC
InventorsAndrew Tipler, Gary Campbell, Mark Collins
Life of this patent
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Abstract
An analyte pre-concentrator for gas chromatography is disclosed generally comprising a tube having a restricted outlet and packed with an adsorbent, wherein the tube serves as the liner of a chromatographic injector, as an adsorbent trap coupled to a chromatographic column, and/or as an adsorbent trap coupled to a headspace sampler. Preferably, a heating device allows the tube to be heated. In a preferred embodiment, the analyte pre-concentrator further comprises a column isolating accessory so that a chromatographic column can be temporarily isolated from substances flowing through the tube.
Claims17
An analyte pre-concentrator for use with a chromatographic column coupled thereto, comprising:
- a chromatographic injector;
- a liner disposed in said injector, said liner having an upper portion and a lower portion;
- an adsorbent disposed in said liner;
- wherein the inner wall of the upper portion of said liner partially encloses an upper chamber in which the adsorbent in disposed;
- wherein the inner wall of the lower portion of said liner partially encloses a lower chamber in which a portion of the chromatographic column is disposed;
- and
- wherein the diameter of the lower chamber is smaller than the diameter of the upper chamber.
A system for pre-concentrating analytes for use with a chromatographic column coupled thereto, comprising:
- a headspace sampler for obtaining headspace vapor containing analytes;
- a transfer line connected to said headspace sampler for transfering the headspace vapor;
- a housing connected to said transfer line to receive the headspace vapor obtained by said headspace sampler;
- a tube disposed in said housing;
- an adsorbent disposed in said tube for adsorbing the analytes when the headspace vapor passes through said tube;
- and
- a heating element disposed in said housing for increasing the temperature of said tube to desorb the analyte into the chromatographic column coupled to said housing.
Dependencies are inferred from the claim text.