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    • 21. 发明授权
    • Tandem time-of-flight mass spectrometer
    • TANDEM飞行时间质谱仪
    • US5202563A
    • 1993-04-13
    • US700697
    • 1991-05-16
    • Robert J. CotterTimothy J. Cornish
    • Robert J. CotterTimothy J. Cornish
    • G01N27/62H01J49/40
    • H01J49/004H01J49/406
    • A tandem time-of-flight mass spectrometer comprises a grounded vacuum housing, two reflecting-type mass analyzers coupled via a collision chamber, and flight channels electrically floated with respect to the grounded vacuum housing. The first reflecting-type mass analyzer receives ionized molecules (ions). These ions pass through the flight channel of the first reflecting-type mass analyzer and are fragmented in the collision chamber. The fragmented ions pass through the flight channel of the second reflecting-type mass analyzer. Detectors disposed in the collision chamber and in the second reflecting-type mass analyzer detect the spectrum of the first reflecting-type mass analyzer and the spectra of the tandem time-of-flight mass analyzer, respectively.
    • 串联飞行时间质谱仪包括接地的真空壳体,通过碰撞室耦合的两个反射型质量分析器和相对于接地的真空壳体浮动的飞行通道。 第一反射型质量分析仪接收电离分子(离子)。 这些离子通过第一反射型质量分析器的飞行通道并在碰撞室中分段。 碎片离子通过第二反射型质量分析仪的飞行通道。 设置在碰撞室中的检测器和第二反射型质量分析器分别检测第一反射型质量分析器的光谱和串联飞行时间质量分析器的光谱。
    • 28. 发明授权
    • Method and apparatus for scanning an ion trap mass spectrometer in the
resonance ejection mode
    • 用于在共振喷射模式下扫描离子阱质谱仪的方法和装置
    • US5572025A
    • 1996-11-05
    • US450464
    • 1995-05-25
    • Robert J. CotterVladimir M. Doroshenko
    • Robert J. CotterVladimir M. Doroshenko
    • H01J49/16H01J49/42B01D59/44H01J49/00
    • H01J49/424H01J49/0009H01J49/429
    • A method of operation of an ion trap mass spectrometer having a ring electrode and pair of end-cap electrodes in a resonance ejection mode is disclosed. The method includes producing ions from a plurality of biomolecules, applying a trapping RF voltage to the ring electrode, applying an excitation voltage to the end-cap electrodes, scanning the trapping RF voltage in order to sequentially eject the ions, controlling a ration of the amplitude of the trapping RF voltage to the amplitude of the excitation voltage in order that the ratio is generally constant, and determining a ratio of mass to charge of the ejected ions. In one embodiment, a feedback voltage which is proportional to the trapping RF voltage is sensed, and the amplitude of the excitation voltage is controlled as a function of the amplitude of the feedback voltage. In another embodiment, a first value related to the amplitude of the trapping RF voltage and a second value, which is proportional to the first value and related to the amplitude of the excitation voltage, are determined. The amplitude of the trapping RF voltage is modulated employing the first value and the amplitude of the excitation voltage is modulated employing the second value. Preferably, the determined mass-to-charge ratio (m/z) of the ejected ions is equal to a constant (.alpha.) times the trapping RF voltage (V). Associated apparatus and method of calibration are also disclosed.
    • 公开了一种具有环形电极和一对端帽电极的共振喷射模式的离子阱质谱仪的操作方法。 该方法包括从多个生物分子产生离子,向环形电极施加捕获RF电压,向端帽电极施加激发电压,扫描捕获RF电压以顺序地喷射离子,控制 将捕获的RF电压的幅度调节到激励电压的幅度,以使该比率基本上恒定,并且确定所排出的离子的质量与电荷的比率。 在一个实施例中,感测与捕获RF电压成比例的反馈电压,并且激励电压的幅度被控制为反馈电压的幅度的函数。 在另一个实施例中,确定与捕获RF电压的幅度相关的第一值和与第一值成比例并且与激励电压的幅度相关的第二值。 使用第一值调制捕获RF电压的幅度,并且使用第二值调制激励电压的幅度。 优选地,所确定的喷射离子的质荷比(m / z)等于捕获RF电压(V)的常数(α)。 还公开了相关装置和校准方法。
    • 29. 发明授权
    • Neutralization/chemical reionization tandem mass spectrometry method and
apparatus therefor
    • 中和/化学反离子串联质谱法及其设备
    • US5101105A
    • 1992-03-31
    • US608435
    • 1990-11-02
    • Catherine FenselauRobert J. Cotter
    • Catherine FenselauRobert J. Cotter
    • H01J49/14
    • H01J49/145H01J49/14
    • A mass spectrometer system including a device for supplying a protonated ion species; a single chamber having an entrance and an exit slit, the chamber receiving the supplied protonated ion and transmitting a reprotonated ion through the exit slit; a device for supplying a predetermined reagent gas within the chamber; a device for supplying an electron beam in said chamber such that the electron beam reacts with the supplied predetermined reagent gas to provide neutral reagent gas and protonated reagent gas within the chamber, the supplied ion species reacting with the neutral reagent gas to neutralize the ion species, thereby providing neutral species within the chamber, the neutral species reacting with the protonated reagent gas to provide reionized species within the chamber; and a device, coupled to the exit slit of the chamber, for extracting the reionized species.
    • 一种质谱仪系统,包括用于提供质子化离子物质的装置; 具有入口和出口狭缝的单个室,所述室接收所提供的质子离子并将再现离子透过出口狭缝; 用于在所述室内供应预定的反应气体的装置; 用于在所述室中供应电子束的装置,使得电子束与所提供的预定反应气体反应以在室内提供中性反应气体和质子化反应气体,所供应的离子物质与中性反应气体反应以中和离子种类 从而在室内提供中性物质,中性物质与质子化的反应气体反应以在室内提供去离子物质; 以及耦合到所述室的出口狭缝的用于提取所述再离子化物质的装置。