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    • 8. 发明授权
    • Flow discharge ion source
    • 流量放电离子源
    • US4321467A
    • 1982-03-23
    • US156511
    • 1980-06-04
    • Sidney E. Buttrill, Jr.
    • Sidney E. Buttrill, Jr.
    • B01D59/44
    • B01D59/44
    • A flowing discharge ion source for supplying negative and positive ions to a mass spectrometer has an elongated, confined flow and discharge region through which flow the sample to be analyzed and a reagent gas and in which ionizing discharge electrodes are located. Inlet and outlet gas flow orifices are independently variable so that the reagent gas pressure in the discharge region and flow velocity therethrough are controlled. Controlling flow velocity provides one way for determining reagent and sample gas residence time, which is further controlled by making the position of the discharge electrodes adjustable along the length of the ionization region. A controllable heater is provided upstream of the discharge region to regulate reagent and sample gas temperature.
    • 用于向质谱仪提供负离子和正离子的流动放电离子源具有细长的限制流动和放电区域,待分析的样品和反应气体的流动,并且其中定位有电离放电电极。 入口和出口气体流量孔是独立可变的,从而控制排放区域中的反应气体压力和流过其中的流速。 控制流速提供了一种确定试剂和样品气体停留时间的方法,通过使放电电极的位置沿离子化区域的长度可调,进一步控制。 在放电区域的上游设置可控加热器,以调节试剂和样品气体温度。