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    • 2. 发明申请
    • MASS SPECTROMETER
    • 质谱仪
    • WO2007125354A2
    • 2007-11-08
    • PCT/GB2007001589
    • 2007-04-30
    • MICROMASS LTDGREEN MARTINWILDGOOSE JASON LEEPRINGLE STEVEN DEREKKENNY DANIEL JAMES
    • GREEN MARTINWILDGOOSE JASON LEEPRINGLE STEVEN DEREKKENNY DANIEL JAMES
    • H01J49/4235H01J49/065
    • An ion guide or mass analyser (2) is disclosed comprising a plurality of electrodes (2a) having apertures through which ions are transmitted in use. A pseudo-potential barrier is created at the exit of the ion guide or mass analyser (2). The amplitude or depth of the pseudo-potential barrier is inversely proportional to the mass to charge ratio of an ion. One or more transient DC voltages (4) are applied to the electrodes (2a) of the ion guide or mass analyser (2) in order to urge ions along the length of the ion guides or mass analyser (2). The amplitude of the transient DC voltage (4) applied to the electrode (2a) may be increased with time so that ions are caused to be emitted from the ion guide or mass analyser (2) in reverse order of their mass to charge ratio.
    • 公开了一种离子导向器或质量分析器(2),其包括具有孔的多个电极(2a),在使用中通过该孔具有离子。 在离子导向器或质量分析器(2)的出口处产生伪势垒。 伪势垒的幅度或深度与离子的质荷比成反比。 一个或多个瞬态DC电压(4)被施加到离子导向器或质量分析器(2)的电极(2a),以促使沿着离子导向器或质量分析器(2)的长度的离子。 施加到电极(2a)的瞬态直流电压(4)的振幅可以随时间增加,使得离子以其质荷比相反的顺序从离子导向器或质量分析器(2)发射。