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    • 1. 发明申请
    • Rectilinear ion trap and mass analyzer system and method
    • 直线离子阱和质量分析仪系统及方法
    • US20040135080A1
    • 2004-07-15
    • US10656667
    • 2003-09-04
    • Zheng OuyangRober t G. Cooks
    • H01J049/42
    • H01J49/422
    • A new geometry ion trap and its use as a mass spectrometer is described. The ion traps can be combined linearly and in parallel to form systems for mass storage, analysis, fragmentation, separation, etc. of ions. The ion trap has a simple rectilinear geometry with a high trapping capacity. It can be operated to provide mass analysis in the mass-selective instability mode as well as the mass-selective stability mode. Arrays of multiple ion traps allow combinations of multiple gas-phase processes to be applied to the trapped ions to achieve high sensitivity, high selectivity and/or higher throughput in the analysis of ions.
    • 描述了一种新的几何离子阱及其作为质谱仪的用途。 离子阱可以线性并联并联以形成离子的大容量存储,分析,分离,分离等的系统。 离子阱具有简单的直线几何形状,具有高捕集能力。 可以在质量选择不稳定模式以及质量选择稳定模式下进行质量分析。 多个离子阱的阵列允许将多个气相过程的组合施加到捕获的离子上,以在离子分析中实现高灵敏度,高选择性和/或更高的通量。
    • 3. 发明申请
    • Fragmentation of ions by resonant excitation in a low pressure ion trap
    • 在低压离子阱中通过共振激发分离离子
    • US20030189168A1
    • 2003-10-09
    • US10310000
    • 2002-12-04
    • Frank LondryBruce A. CollingsWilliam R. Stott
    • H01J049/42
    • H01J49/4225H01J49/0063H01J49/421
    • In the field of mass spectrometry, a method and apparatus for fragmenting ions with a relatively high degree of resolution. The technique includes trapping the ions in an ion trap, preferably a linear ion trap, in which the background or neutral gas pressure is preferably on the order of 10null5 Torr. The trapped ions are resonantly excited for a relatively extended period of time, e.g., exceeding 50 ms, at relatively low excitation levels, e.g., less than 1V(0nullpk). The technique allows selective dissociation of ions with a discrimination of at least about 1 m/z at a practical fragmentation efficiencies. Apparatus and related methods are also disclosed for obtaining MS, MS2, MS3 and MSn spectrums at relatively high resolutions using the low pressure fragmentation technique.
    • 在质谱领域中,以分辨率较高的方式分离离子的方法和装置。 该技术包括将离子俘获在离子阱中,优选线性离子阱,其中背景或中性气体压力优选在10 -5 Torr量级。 被俘获的离子在相对较低的激发水平(例如小于1V(0-pk))下相对延长的时间段(例如超过50ms)被共振激发。 该技术允许在实际的分裂效率下以至少约1m / z的区别选择性离解离子。 还公开了使用低压碎裂技术以相对高分辨率获得MS,MS 2,MS 3和MS n谱的装置和相关方法。
    • 4. 发明申请
    • Ion trap device
    • 离子阱装置
    • US20030071210A1
    • 2003-04-17
    • US10244534
    • 2002-09-17
    • SHIMADZU CORPORATION
    • Eizo Kawato
    • H01J049/42
    • H01J49/4205H01J49/022
    • In an ion trap device using an RF electric field to trap ions, when the amplitude of the RF voltage for generating the RF electric field is changed from a first value to a second value, it is changed according to the exponential function of time. And the time constant of the exponential function is set equal to or longer than the time constant of the resonant circuit for generating the RF voltage. Owing to this, the time necessary to change the RF voltage is shortened, and an overshoot, undershoot, or ringing of an actual RF voltage on the electrode or electrodes of an ion trap is avoided when the RF voltage setting value is changed, so that the movement of ions in the ion trap is not disturbed and the throughput of the ion trap device is improved.
    • 在使用RF电场捕获离子的离子阱装置中,当用于产生RF电场的RF电压的幅度从第一值变为第二值时,根据时间的指数函数来改变。 并且将指数函数的时间常数设定为等于或大于用于产生RF电压的谐振电路的时间常数。 因此,改变RF电压所需的时间被缩短,并且当RF电压设定值改变时,避免了离子阱的电极或电极上的实际RF电压的过冲,下冲或振铃,使得 离子阱中的离子的运动不受干扰,并且提高了离子阱装置的生产量。
    • 6. 发明申请
    • Ion trap mass spectrometer
    • 离子阱质谱仪
    • US20020195559A1
    • 2002-12-26
    • US10170687
    • 2002-06-14
    • Shimadzu Corporation
    • Kozo Miseki
    • H01J049/42
    • H01J49/424H01J49/428
    • In an ion trap mass spectrometer including an ion trap space surrounded by a ring electrode and two end cap electrodes placed opposite each other with the ring electrode between them, a method of trapping object ions of a predetermined mass-to-charge ratio in the ion trap space more assuredly and effectively. The method includes the steps of: applying an RF voltage to the ring electrode to trap the object ions; and applying an auxiliary AC voltage to the end cap electrodes, where the auxiliary voltage has a frequency spectrum with a first notch at the basic frequency of the object ions and a second notch at a a beat frequency. Then the second stage is performed where another auxiliary AC voltage of the beat frequency is applied to the end cap electrodes to expel non-object ions still remaining in the ion trap space.
    • 在离子阱质谱仪中,包括由环形电极和两个端盖电极围绕的离子阱空间,两个端盖电极与它们之间的环形电极相对放置,在离子中捕获预定质荷比的物体离子的方法 陷阱空间更加放心和有效。 该方法包括以下步骤:向环形电极施加RF电压以捕获物体离子; 以及向所述端盖电极施加辅助AC电压,其中所述辅助电压具有在所述物体离子的基本频率处具有第一陷波的频谱和以拍频的第二陷波。 然后执行第二阶段,其中将拍频的另一辅助AC电压施加到端帽电极以排出仍然留在离子阱空间中的非对象离子。
    • 9. 发明申请
    • Mass spectrometer
    • 质谱仪
    • US20010000618A1
    • 2001-05-03
    • US09739217
    • 2000-12-19
    • Hitachi, Ltd.
    • Yasuaki TakadaMinoru SakairiTakayuki NabeshimaYukiko HirabayashiHideaki Koizumi
    • H01J049/42
    • H01J49/067H01J49/04
    • A mass spectrometer comprising an ionization means For ionizing sample compounds to be analyzed mass spectro-scopically in an atmospheric pressure, a sample solution supply means for supplying a solution containing the sample compounds to the ionization means, means for feeding the ions formed by the ionization means through an aperture disposed in an electrode into a vacuum region and a ion trap type mass spectroscopic means for mass spectroscopically analyzing ions entered through the aperture into the vacuum region, in which an ion decelerating electric field forming means is disposed between the electrode disposed with the aperture and an electrode disposed with an ion entrance opening for entering the ions into the ion trap type mass spectroscopic means for forming an electric field for decelerating the ions, and the ions injected to the ion trap mass spectroscopic means is lowered. This facilitates accumulation ions in the ion crap mass spectralyzing means even if a high drift voltage is used thereby enabling high sensitivity analysis for polar compounds such as peptides.
    • 一种包含电离装置的质谱仪用于在大气压下电离质谱分析的样品化合物,向离子化装置供给含有样品化合物的溶液的样品溶液供给装置,用于将由离子化形成的离子进料的装置 意味着通过设置在电极中的孔进入真空区域和离子阱型质谱分析装置,用于质谱分析通过孔进入真空区域的离子,其中离子减速电场形成装置设置在设置有 所述孔和电极设置有离子入口,用于将离子进入离子阱型质谱分析装置,用于形成用于使离子减速的电场,以及注入离子阱质谱分析装置的离子。 即使使用高漂移电压,也有利于离子废物质谱分析手段中的积聚离子,从而能够对极性化合物如肽进行高灵敏度分析。