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公开(公告)号：US08324566B2
公开(公告)日：2012-12-04
申请号：US13037792
申请日：2011-03-01
CPC分类号： H01J49/427
摘要： In an RF quadrupole ion trap having electrodes to which RF voltages are applied, ions having m/z ratios outside of a predefined narrow range of charge-related masses m/z are removed from the trap by applying a DC voltage pulse to at least one of the trap electrodes to remove from the trap the ions with high values of charge-related masses. The DC voltage pulse is preferably applied in combination with a variation of the RF voltage amplitudes to simultaneously remove from the trap ions of low charge-related masses. The DC and RF voltage amplitudes are changed in such a manner that any excitation of ions having charge-related masses within the predefined range by frequency mixtures is avoided.
摘要翻译： 在具有施加有RF电压的电极的RF四极离子阱中，通过将DC电压脉冲施加到至少一个电压来从陷阱中去除具有预定的窄电荷相关质量m / z范围之外的m / z比的离子 的陷阱电极从陷阱中去除具有高电荷相关质量值的离子。 DC电压脉冲优选与RF电压幅度的变化相结合地同时从低电荷相关质量的俘获离子中去除。 DC和RF电压幅度以这样的方式改变，即避免了通过频率混合将具有电荷相关质量的离子激发在预定范围内。
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公开(公告)号：US20120223222A1
公开(公告)日：2012-09-06
申请号：US13037792
申请日：2011-03-01
IPC分类号： H01J49/22
CPC分类号： H01J49/427
摘要： In an RF quadrupole ion trap having electrodes to which RF voltages are applied, ions having m/z ratios outside of a predefined narrow range of charge-related masses m/z are removed from the trap by applying a DC voltage pulse to at least one of the trap electrodes to remove from the trap the ions with high values of charge-related masses. The DC voltage pulse is preferably applied in combination with a variation of the RF voltage amplitudes to simultaneously remove from the trap ions of low charge-related masses. The DC and RF voltage amplitudes are changed in such a manner that any excitation of ions having charge-related masses within the predefined range by frequency mixtures is avoided.
摘要翻译： 在具有施加有RF电压的电极的RF四极离子阱中，通过将DC电压脉冲施加到至少一个电压来从陷阱中除去具有预定的窄电荷相关质量m / z范围之外的m / z比的离子 的陷阱电极从陷阱中去除具有高电荷相关质量值的离子。 DC电压脉冲优选与RF电压幅度的变化相结合地同时从低电荷相关质量的俘获离子中去除。 DC和RF电压幅度以这样的方式改变，即避免了通过频率混合将具有电荷相关质量的离子激发在预定范围内。
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公开(公告)号：US07247845B1
公开(公告)日：2007-07-24
申请号：US10031542
申请日：2000-07-20
IPC分类号： H01J49/26
CPC分类号： F03H1/00 , H01J27/026 , H01J49/0463 , H05H3/02
摘要： A method for cluster fragmentation comprises the production of at least one cluster which contains a carrier substance and the fragmentation of the cluster into cluster fragments, with the cluster being loaded before the fragmentation with at least one reaction partner and the reaction partner being part of at least one cluster fragment after the fragmentation. A cluster beam system for performing the method, and applications of the cluster fragmentation for analysis and purification of surfaces, for analysis of clusters, and for the operation of ion thrusters are also described.
摘要翻译： 簇分裂的方法包括产生含有载体物质的至少一个簇和将簇分解成簇片段，其中簇在与至少一个反应伴侣和反应伴侣之间的一部分在碎片化之前被加载 碎片后至少有一个集群片段。 还描述了用于执行该方法的群集束系统，以及用于分析和净化表面的群集碎片的应用，用于群集分析以及离子推进器的操作的应用。
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公开(公告)号：US20060289737A1
公开(公告)日：2006-12-28
申请号：US11442655
申请日：2006-05-26
IPC分类号： B01D59/44
CPC分类号： G01N30/7233 , G01N30/38 , G01N30/80 , G01N2030/8447
摘要： The invention relates to a mass spectrometric mixture analysis to determine both simple mass spectra of the substances as well as more detailed information about structures and other characteristics of the substances. The invention consists in temporally separating the substance mixture in a separating device, splitting the eluating flow of substances into at least two partial flows and measuring the substances in the different partial flows by mass spectrometry. A direct measurement provides a series of spectra whose evaluation is used for optimal control of the time at which a spectrum of another, delayed partial flow is acquired and the type of this measurement procedure. The substances of the delayed partial flows or their ions can thereby be chemically or physically modified in a variety of ways in order to provide the molecular weight as well as more detailed information.
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