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Automated, on-demand ion mobility spectrometry analysis of gas chromatograph effluents

  • US 5,811,059 A
  • Filed: 10/16/1995
  • Issued: 09/22/1998
  • Est. Priority Date: 10/16/1995
  • Status: Expired due to Fees
First Claim
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1. An apparatus for detecting the presence of and analyzing a component in a gas which comprises,(a) a gas chromatography;

  • (b) an ion mobility spectrometer;

    (c) means for inputting a regulated flow of a gas to be analyzed to the gas chromatograph; and

    (d) an interface positioned between the gas chromatograph and the ion mobility spectrometer;

    (e) said interface including a detector for analyzing eluted gas from the gas chromatography, valve means directly connected to the ion mobility spectrometer for normally exhausting the analyzed eluted gas from said detector to preclude the analyzed eluted gas from entering the ion mobility spectrometer, and control means operatively connected to said detector and said valve means for selectively inputting a portion of the analyzed eluted gas to the ion mobility spectrometer for analysis in response to a detection signal from the detector corresponding to a component to be analyzed in the eluted gas.

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