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    Staged Preconcentration and parallel column gas chromatography
    11.
    发明授权
    Staged Preconcentration and parallel column gas chromatography 有权

    公开(公告)号：US10088458B2

    公开(公告)日：2018-10-02

    申请号：US15379963

    申请日：2016-12-15

    申请人： David R. Hall ,  Dan Allen ,  Steven Butala

    发明人： David R. Hall ,  Dan Allen ,  Steven Butala

    IPC分类号： G01N30/14 ,  G01N30/16 ,  B01D53/04 ,  G01N30/08 ,  G01N1/22 ,  G01N30/02

    摘要： We disclose a device that both extracts and preconcentrates volatile analytes in preparation for separation by gas chromatography. The device includes a conduit that may include two, and sometimes three, separate sections that are connected end-to-end, but which may be separated prior to inserting into a gas chromatograph port. The inner surface of each section is coated with one or more sorbents, each with a different affinity for volatile analytes. The sorbents may be positioned along the sections of the column in order of relative affinity for volatile analytes. The sections may be heated independently of each other to release the volatile analytes from the sorbents more quickly. This device reduces the time and the temperature required to achieve separation by gas chromatography. The device may be used to perform gas chromatography in ubiquitous environments such as the home or a mobile situation.

    Microfabricated Staged Preconcentration and Parallel Column for Gas Chromatography
    14.
    发明申请
    Microfabricated Staged Preconcentration and Parallel Column for Gas Chromatography 审中-公开

    公开(公告)号：US20180172646A1

    公开(公告)日：2018-06-21

    申请号：US15380064

    申请日：2016-12-15

    申请人： David R. Hall ,  Dan Allen ,  Steven Butala ,  Terrece Pearman

    发明人： David R. Hall ,  Dan Allen ,  Steven Butala ,  Terrece Pearman

    IPC分类号： G01N30/14

    CPC分类号： G01N30/14 ,  G01N2030/0095 ,  G01N2030/025 ,  G01N2030/062 ,  G01N2030/143

    摘要： We disclose a microfabricated device for both extracting and preconcentrating samples for gas chromatography analysis. The device includes a conduit with at least two sections and multiple ports which may be connected to multiple gas chromatography columns. The inner surface of the conduit may be coated with multiple sorbents which bind volatile analytes with different affinities. The sections of the conduit may be divided by a thermal barrier which inhibits heat transfer between sections. Consequently, each section may be independently heated to encourage desorption of volatile analytes. The disclosed device separates and concentrates volatile analytes into different pools according to their chemical and physical properties before they enter a gas chromatography column that is optimized for that pool. The device reduces the amount of heat and time needed to perform gas chromatography analysis as well as avoids the need for purified gas sources typically used for the moving phase.