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Non-contact trace chemical screening

  • US 9,048,076 B2
  • Filed: 05/25/2012
  • Issued: 06/02/2015
  • Est. Priority Date: 05/27/2011
  • Status: Expired due to Fees
First Claim
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1. A device for detecting a target substance on a subject without contacting said subject, said device comprising:

  • at least one air jet for blowing analyte from a surface of said subject into an airflow, said airflow entraining said analyte;

    a desorber comprising;

    an inlet for receiving at least a portion of said airflow including entrained analyte;

    a desorption channel in fluid communication with said inlet for desorbing molecules from analyte entrained in said portion of said airflow received by way of said inlet, and travelling through said desorption channel;

    an ionizer, in fluid communication with said desorption channel, for forming ions from vapour molecules in said portion of said airflow;

    at least one mass spectrometer in fluid communication with said ionizer, for analyzing said ions to detect said target substance;

    wherein said airflow travels without interruption from said subject to said at least one mass spectrometer; and

    wherein said desorption channel causes a sufficient quantity of molecules to desorb from said analyte to enable said at least one mass spectrometer to detect said target substance.

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