INDENTIFICATION OF CHEMICALS IN A SAMPLE USING GC/SAW AND RAMAN SPECTROSCOPY

    公开(公告)号:US20200011769A1

    公开(公告)日:2020-01-09

    申请号:US16576021

    申请日:2019-09-19

    Inventor: Yin Sun

    Abstract: A method for identification of chemicals in a sample using a gas chromatograph, a surface acoustic wave (SAW) sensor coupled with the gas chromatograph to define a gas chromatography (GC)/SAW system, and a Raman spectrometer. The method includes receiving SAW frequency response data generated by the SAW sensor, receiving Raman spectrum data generated by the Raman spectrometer, producing a Raman spectrum corresponding to an eluted component of interest based upon an integration of the Raman spectrum data, identifying a set of one or more candidate chemicals for the eluted component of interest based on a corresponding peak of the SAW frequency response data, and searching a Raman database for a match between the produced Raman spectrum and a chemical in the Raman database from among the set of candidate chemicals for the eluted component of interest.

    Method of sampling a cryogenic liquid

    公开(公告)号:US10473561B2

    公开(公告)日:2019-11-12

    申请号:US15823785

    申请日:2017-11-28

    Abstract: One embodiment of the method includes: closing both the inlet valve and the outlet valve, connecting a cryogenic liquid source to the cryogenic liquid inlet conduit, and introducing cryogenic liquid into the cryogenic liquid inlet conduit; opening both the inlet valve and outlet valve, thereby introducing cryogenic liquid into the sampler vessel inner volume, the cryogenic liquid has a free surface; closing both the inlet valve and the outlet valve after cryogenic liquid flows from the purge tube; disconnecting the cryogenic liquid source from the cryogenic liquid inlet conduit; opening the inlet valve, thereby allowing cryogenic liquid to flow from the cryogenic liquid inlet conduit; and closing the inlet valve after the free surface in the sampler vessel inner volume drops below the top of the first cryogenic liquid level, and the cryogenic liquid flow stops.

    Composite gas sampling system
    117.
    发明授权

    公开(公告)号:US10429278B2

    公开(公告)日:2019-10-01

    申请号:US15355776

    申请日:2016-11-18

    Abstract: A sampling system for collecting periodic composite and/or non-composite samples of vaporized gas during a transfer process from a vaporizer of a cryogenic hydrocarbon liquid including 1) a direct sample pathway to a gas analyzer for instantaneous, real-time vaporized gas analysis, 2) a speed loop pathway for directly collecting fresh vaporized gas samples for subsequent analysis, and 3) a composite sample pathway including a pressurized sample accumulator for collecting a plurality periodically obtained samples of a select volume during the transfer process to create a composite sample of the vaporized gas.

    Spectrometer with a relay lightpipe
    118.
    发明授权

    公开(公告)号:US10422743B2

    公开(公告)日:2019-09-24

    申请号:US15887196

    申请日:2018-02-02

    Abstract: A lightpipe is coupled to a spectrometer based on a laterally variable optical filter. The lightpipe may be used for both guiding the illuminating light towards a sample and collecting light reflected or emitted by the sample upon illumination, for spectral measurements at a distance from the sample afforded by the lightpipe. The lightpipe may include a slab of homogeneous transparent material for unconstrained bidirectional propagation of light in bulk of the material. The lightpipe may be solid, hollow, or sectioned for separated guiding of the illuminating and the reflected light.

    Container for specimen preparation
    119.
    发明授权

    公开(公告)号:US10386277B2

    公开(公告)日:2019-08-20

    申请号:US14908034

    申请日:2014-07-25

    Abstract: A mechanism for collecting a trace of a biological sample to be used for a biological sample analysis, and for preparing a diluted solution of the sample. A container for specimen preparation includes: a biological sample collecting device; and a container for sample dilution. The biological sample collecting device includes: a capillary tube having openings formed at both ends thereof; and a support member for supporting the capillary tube. The container for sample dilution includes: an opening; and a swirl flow generating member formed on an inner wall of the container for sample dilution. The capillary tube of the biological sample collecting device is arranged inside the container for sample dilution by the support member.

    Long path cell
    120.
    发明授权

    公开(公告)号:US10365204B2

    公开(公告)日:2019-07-30

    申请号:US16077490

    申请日:2017-02-09

    Applicant: Tom Rubin

    Inventor: Tom Rubin

    Abstract: The invention relates to a long path cell (10), in particular a Herriott cell, with (a) a primary mirror (12) and (b) a secondary mirror (14). According to the invention, it is provided that the primary mirror (12) has a first primary mirror segment (42.1) and at least one second primary mirror segment (42.2), which radially surrounds the first primary mirror segment (42.1), whereby the primary mirror segments (42) differ in their curvatures (R42.1, 42.2) or focal lengths, the secondary mirror (14) has a first secondary mirror segment (44.1) and at least one second secondary mirror segment (44.2) which radially sur-rounds the first secondary mirror segment (44.1), whereby the secondary mirror segments (44) differ in their curvatures (R42.1, R42.2) or focal lengths, the first primary mirror segment (42.1) and the first secondary mirror segment (44.1) are arranged in relation to each other such that a light beam is reflected back and forth between the two, and that the second primary mirror segment (42.2) and the second secondary mirror segment (44.2) are arranged in relation to each other such that a light beam is reflected back and forth between the two.

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