Ion mobility spectrometer and method for improving detection sensitivity thereof

Ion mobility spectrometer and method for improving detection sensitivity thereof

  • CN 102,074,448 B
  • Filed: 11/20/2009
  • Issued: 09/24/2014
  • Est. Priority Date: 11/20/2009
  • Status: Active Grant
First Claim
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1. an ionic migration spectrometer, comprise:

  • sampling device, migration tube, air-channel system, wherein said migration tube is divided into ionization reaction zone and gas migration area by ion gate, in the one end contrary with ionization reaction zone in described gas transfer district, is provided with the detector for detection of ionBe characterised in that, described air-channel system comprises;

    dry gas circuit, migration gas circuit, doping gas circuit and unloaded gas circuit, wherein;

    The air of described dry gas circuit for providing drying to purify to described migration gas circuit, doping gas circuit, unloaded gas circuit respectively;

    The air that described migration gas circuit is used for crossing to gas transfer district importing dry decontamination from rear end is as migration air-flow;

    Described doping gas circuit is for appropriate dopant steam is provided, and according to the dry gas circuit of external control instruction connection, the air of crossing via dry decontamination carries, and dopant steam selectivity is imported to described ionization reaction zone;

    Described unloaded gas circuit is for importing to described ionization reaction zone the air that dry decontamination is crossed.

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