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    • 5. 发明公开
    • MASS ANALYZER
    • MASSENANALYSATOR
    • EP2309531A4
    • 2013-11-20
    • EP08764185
    • 2008-06-20
    • SHIMADZU CORP
    • TANIGUCHI JUNICHI
    • H01J49/42H01J49/04H01J49/40
    • H01J49/36H01J49/004H01J49/0481H01J49/40H01J49/424H01J49/426H01J49/427
    • In performing an isolation of specific ions or performing a dissociation operation by CID, ions are captured by applying a radio-frequency high voltage to a ring electrode 31 as before. In a cooling operation which is performed immediately before target ions are ejected toward a TOFMS unit 4 with the ions stored in an ion trap 3, a radio-frequency high voltage is not applied to the ring electrode 31 but to end cap electrodes 32 and 34 to capture the ions. In this operation, the frequency thereof is set to be higher than that of the voltage applied to the ring electrode 31 and the amplitude is also increased in order to assure a large pseudopotential and keep the low mass cutoff (LMC), This narrows the spatial distribution of the cooled ions, reducing the variation of the initial positions of the ions at the point in time when they are ejected, which increases the mass resolution. In addition, since an isolation of ions having a large m/z can be performed with a great q z value as is conventionally done, a high mass selectivity can be assured.
    • 在执行特定离子的分离或通过CID进行解离操作时,如前所述通过向环形电极31施加射频高电压来捕获离子。 在将离子存储在离子阱3内的目标离子朝向TOFMS单元4喷射之前进行的冷却运转中,射频高压不施加到环形电极31而是端盖电极32和34 捕获离子。 在该操作中,其频率被设定为高于施加到环形电极31的电压的频率,并且为了确保大的伪电位并保持低质量截止(LMC),振幅也增加。这缩小了空间 冷却的离子的分布,减少离子在它们被喷射的时间点的初始位置的变化,这增加了质量分辨率。 此外,由于如以往那样以大的q z值进行具有大m / z的离子的分离,因此可以确保高的质量选择性。
    • 8. 发明公开
    • MASS ANALYZER
    • 质量分析仪
    • EP2309531A1
    • 2011-04-13
    • EP08764185.8
    • 2008-06-20
    • Shimadzu Corporation
    • TANIGUCHI, Junichi
    • H01J49/42G01N27/62
    • H01J49/36H01J49/004H01J49/0481H01J49/40H01J49/424H01J49/426H01J49/427
    • In performing an isolation of specific ions or performing a dissociation operation by CID, ions are captured by applying a radio-frequency high voltage to a ring electrode 31 as before. In a cooling operation which is performed immediately before target ions are ejected toward a TOFMS unit 4 with the ions stored in an ion trap 3, a radio-frequency high voltage is not applied to the ring electrode 31 but to end cap electrodes 32 and 34 to capture the ions. In this operation, the frequency thereof is set to be higher than that of the voltage applied to the ring electrode 31 and the amplitude is also increased in order to assure a large pseudopotential and keep the low mass cutoff (LMC), This narrows the spatial distribution of the cooled ions, reducing the variation of the initial positions of the ions at the point in time when they are ejected, which increases the mass resolution. In addition, since an isolation of ions having a large m/z can be performed with a great q z value as is conventionally done, a high mass selectivity can be assured.
    • 在执行特定离子的隔离或通过CID执行解离操作时,通过如前所述向环形电极31施加射频高电压来捕获离子。 在离子存储在离子阱3中的离子朝向TOFMS单元4喷射之前立即进行的冷却操作中,射频高电压不施加到环形电极31,而是施加到端部电极32和34 捕捉离子。 在该操作中,其频率被设置为高于施加到环形电极31的电压的频率,并且振幅也被增大以确保较大的赝势并保持低质量截止(LMC)。这使得空间 冷却离子的分布,减少离子在它们被喷射时的初始位置的变化,这增加了质量分辨率。 另外,由于可以按照常规方式以很高的qz值进行具有大m / z的离子的分离,所以可以确保高质量选择性。