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    • 57. 发明授权
    • FIXED-VOLUMED INJECTOR WITH BACKFLUSH CAPABILITY
    • 具有反冲功能的固定体积喷油器
    • EP0815442B1
    • 1998-11-25
    • EP96909550.4
    • 1996-03-01
    • MICROSENSOR TECHNOLOGY, INC.
    • JOHNSON, Paul, H.
    • G01N30/20G01N30/60G01N30/40G01N1/00G01N30/16
    • G01N30/60G01N30/16G01N30/20G01N30/40G01N30/6095G01N2030/025G01N2030/085G01N2030/205G01N2030/385G01N2030/402
    • A fixed-volume injector assembly having backflush capability is useful for injecting a sample into a gas chromatograph. The injector assembly has a sampling mode of operation, an injection mode of operation and a backflush mode of operation. In the sampling mode, sample is drawn into sampling chamber (11). In the injection mode, sample is injected into an injection channel which conducts the sample to a destination stream. In the backflush mode, carrier fluid flows through the injector assembly in the opposite direction. The injector assembly is designed to connect to precolumn (28) and analytical column (20) so that, in the backflush mode, precolumn (28) is backflushed. Advantages of the injector assembly include the ability to pressurize the sample before injection and to use a single carrier fluid source. In addition, the flow channels of the injector assembly are readily miniaturized.
    • 具有反吹能力的固定体积的喷射器组件对于将样品注入气相色谱仪是有用的。 该喷射器组件具有采样操作模式,喷射操作模式和反冲洗操作模式。 在采样模式下,样品被吸入采样室(11)。 在注射模式中,样品被注入到将样品引导至目标流的注射通道中。 在反吹模式下,载液沿相反的方向流过进样器组件。 进样器组件被设计成连接到预柱(28)和分析柱(20),以使得在反吹模式中,预柱(28)被反冲洗。 注射器组件的优点包括在注射前加压样品并使用单一载体流体源的能力。 另外,喷射器组件的流动通道容易小型化。