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    • 33. 发明授权
    • Flow-limited direct GC/MS interface
    • 流量限制直接GC / MS接口
    • US4662914A
    • 1987-05-05
    • US712840
    • 1985-03-18
    • Stuart C. HansenJean-Luc Truche
    • Stuart C. HansenJean-Luc Truche
    • G01N30/30G01N30/72H01J49/04B01D15/08
    • H01J49/0422G01N30/7206G01N2030/3007G01N2030/3038G01N30/7293
    • A capillary-direct interface, suitable for connecting a gas chromatograph to a mass spectrometer, having a flow restrictor that is to be mounted at the entrance to the ionization chamber of the mass spectrometer to prevent damage to the mass spectrometer if the column of the gas chromatograph is removed from the mass spectrometer or breaks inside the interface. A preferred flow restrictor includes a hollow tube, the middle of which is connected to an exhaust port to enable a vacuum pump to remove gas from the middle of the tube. The hollow tube is enclosed by a high thermal conductivity tube that is thermally connected to a heat source to control the temperature of the hollow tube. A capillary GC column can be inserted entirely through the hollow tube into the ionization chamber to produce a capillary direct mode of coupling. Also, an additional capillary tube, inside the hollow tube and extending from the ionization and detection chamber to the end of the GC column, can be used to implement the open-split and jet separator modes of coupling.
    • 一种适用于将气相色谱仪连接到质谱仪的毛细管直接界面,​​具有限流器,该流量限制器将安装在质谱仪离子化室的入口处,以防止质谱仪损坏质谱仪 色谱仪从质谱仪中除去或在界面内断裂。 优选的流量限制器包括中空管,其中间管连接到排气口,以使得真空泵能够从管的中部移除气体。 中空管由与热源热连接的高导热管包围,以控制中空管的温度。 毛细管GC柱可以通过中空管完全插入电离室,以产生毛细管直接耦合模式。 此外,在中空管内部并从电离和检测室延伸到GC柱的末端的另外的毛细管可以用于实现开放式分离和喷射分离器的耦合模式。
    • 37. 发明申请
    • PASSIVE COLUMN PRE-HEATER FOR USE IN CHROMATOGRAPHIC SYSTEMS
    • 被动色谱柱预热器用于色谱系统
    • US20170038345A1
    • 2017-02-09
    • US15303321
    • 2015-04-10
    • Waters Technologies Corporation
    • Joshua A. ShreveKurt D. Joudrey
    • G01N30/30G01N1/44
    • G01N30/30G01N1/44G01N2030/3007
    • A passive pre-heater assembly includes a thermally conductive heat-spreading block and a plurality of passive pre-heaters in thermally conductive communication with the heat-spreading block. The plurality of the pre-heaters exchanges heat with the thermally conductive heat-spreading block. Each pre-heater includes a thermally conductive base in thermal communication with the heat-spreading block, and a plurality of thermally conductive fins is in thermal communication with the thermally conductive base. The plurality of fins of each pre-heater exchanges heat convectively with ambient air and conductively with the thermally conductive base of that pre-heater. A given one of the passive pre-heaters further comprises a tube in thermally conductive contact with the thermally conductive base of the given passive pre-heater. The thermally conductive heat-spreading block exchanges heat with a fluid passing through the tube of the given passive pre-heater.
    • 无源预热器组件包括导热散热块和与热扩散块导热连通的多个无源预热器。 多个预热器与导热散热块交换热量。 每个预热器包括与热扩散块热连通的导热基座,并且多个导热翅片与导热基底热连通。 每个预热器的多个散热片与环境空气对流交换热量,并与该预热器的导热底座导电地交换。 被动预热器中的给定的一个还包括与给定的无源预热器的导热底座导热接触的管。 导热散热块与通过给定无源预热器的管的流体进行热交换。