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Sample injection system

  • US 7,288,228 B2
  • Filed: 02/12/2002
  • Issued: 10/30/2007
  • Est. Priority Date: 02/12/2002
  • Status: Active Grant
First Claim
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1. A liquid chromatography sample injection system comprising:

  • an arm;

    a probe mounted on the arm;

    an injector valve mounted on the arm;

    a conduit, wherein the conduit directly connects the injector valve and the probe;

    a source of dilutant;

    a probe pump;

    a pump valve interfacing with the injector valve, the probe pump and the source of dilutant; and

    a controller operably coupled to the probe pump, the injector valve, and the pump valve, wherein the controller alternates the injector valve between a loading position and an injection position and alternates the pump valve between a first position where a sample can be aspirated and dispensed through the probe and a second position where the probe can be rinsed via communication between the probe pump and the source of dilutant after the injector valve loads the sample and injects the sample.

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