ATMOSPHERIC PURGE SYSTEM AND METHOD FOR LASER ABLATION SAMPLE PROCESSING

    公开(公告)号:US20230298879A1

    公开(公告)日:2023-09-21

    申请号:US18184205

    申请日:2023-03-15

    CPC classification number: H01J49/105 H01J49/0495

    Abstract: Systems and methods are described for controlling flow of a purge gas introduced to an ablation cell between samples to remove atmospheric gas. A system embodiment includes, but is not limited to, a spray chamber including a spray chamber body, a transfer gas inlet configured to receive gas from a laser ablation sample cell, a first outlet line configured to transfer gas from the spray chamber to an inductively-coupled plasma torch, and a second outlet line coupled to the spray chamber body, the second gas outlet having a larger internal cross-sectional area than an internal cross-sectional area of the first outlet line; and a valve fluidically coupled to the second outlet line, the valve configured to transition between at least an open configuration configured to permit transfer gas through the second outlet line and a closed configuration configured to prevent transfer of gas through the second outlet line.

    ABRASIVE SAMPLING SYSTEM AND METHOD FOR REPRESENTATIVE, HOMOGENEOUS, AND PLANARIZED PREPARATION OF SOLID SAMPLES FOR LASER ABLATION

    公开(公告)号:US20220026369A1

    公开(公告)日:2022-01-27

    申请号:US17381939

    申请日:2021-07-21

    Abstract: Systems and methods are described for providing a representative, homogeneous, and planarized target for solid sample laser ablation. A method embodiment includes, but is not limited to, removing portions of a solid sample with an abrasive sampling system, the abrasive sampling system including at least one of a plurality of abrasive particles configured to hold the portions of the solid sample on an abrasive substrate between the abrasive particles or a texturized surface configured to hold the portions of the solid sample on the texturized surface; transferring the abrasive sampling system holding the portions of the solid sample to a laser ablation system; and ablating the portions of the solid sample held by the abrasive sampling system with the laser ablation system.

    MEMBRANE-BASED PURGE GAS AND SAMPLE TRANSFER FOR LASER ABLATION SAMPLE PROCESSING

    公开(公告)号:US20230298877A1

    公开(公告)日:2023-09-21

    申请号:US18184236

    申请日:2023-03-15

    CPC classification number: H01J49/0463 H01J49/105 G05D7/0617

    Abstract: Systems and methods are described for transferring gas from an ablation cell to an inductively coupled plasma analysis system via a gas exchange membrane transfer line to exchange gas introduced to the ablation cell with a sweep gas. A system embodiment includes, but is not limited to, a laser ablation cell configured to generate a sample transfer stream through laser ablation of a sample and introduction of a carrier gas to flow the ablated sample from the laser ablation cell; an inductively-coupled plasma analysis device configured to measure one or more analytes in the sample transfer stream; and a gas exchange membrane transfer line fluidically coupled between the laser ablation cell and the inductively-coupled plasma analysis device, the gas exchange membrane transfer line configured to replace gas in the sample transfer stream with sweep gas via gas exchange across a membrane of the gas exchange membrane transfer line.

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