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    Ion Source And Sample Introduction Method And Apparatus Using Two Stage Ionization For Producing Sample Gas Ions

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    Date
    6/8/1993
    Author
    Eisele, Fred L.
    Berresheim, Harald
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    Abstract
    A high pressure interface device for introducing sample ions to a drift tube, an ion detection means or a mass mobility measurement means, having an ion source ionization region containing an isolated ionization source, a sample introduction port, and a reaction region in which specific sample ion species are formed by reaction of sample molecules with selected ion source ions formed by radioactive bombardment of a sample gas by the ion source ions results in an ionized gaseous sample. When coupled to a ion or mass detection or measurement means, this invention makes possible detection sensitivities of trace sample species in the subparts-per-trillion range, and under proper condition does not need calibration.
    URI
    http://hdl.handle.net/1853/57140
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