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1. 发明申请

WO1997044814A1 METHOD AND APPARATUS FOR ISOLATING IONS IN AN ION TRAP WITH INCREASED RESOLVING POWER 审中-公开
标题翻译：用于在离子束中分离离子的方法和装置，具有增加的分辨力
公开(公告)号：WO1997044814A1
公开(公告)日：1997-11-27
申请号：PCT/US1997008346
申请日：1997-05-19
申请人： THE JOHNS HOPKINS UNIVERSITY
发明人： THE JOHNS HOPKINS UNIVERSITY , DOROSHENKO, Vladimir M. , COTTER, Robert, J.
IPC分类号： H01J49/42
CPC分类号： H01J49/424 , H01J49/427
摘要： A method of operation of an ion trap mass spectrometer which isolates a first group of ions having a mass-to-charge ratio range is disclosed. The method includes producing ions from a plurality of atoms or molecules; trapping the ions in the ion trap by applying a trapping voltage to a ring electrode; applying an excitation voltage to a pair of end-cap electrodes; employing as the excitation voltage a broadband excitation waveform having first, second, and third excitation portions, with the first and third excitation portions exciting the ions excluding substantially all of the first group of ions and also excluding substantially all of a second group of ions having a range of mass-to-charge ratios about the at least one mass-to-charge ratio of the first group of ions, and the second excitation portion exciting the second group of ions; applying the first and third excitation portions in order to eject the ions excluding substantially all of the first and second groups of ions; and applying the second excitation portion in order to sequentially eject the ions excluding substantially all of the first group of ions, thereby isolating the first group of ions in the ion trap. Associated apparatus is also disclosed.
摘要翻译：公开了一种离子阱质谱仪的操作方法，其分离具有质荷比范围的第一组离子。该方法包括从多个原子或分子产生离子; 通过向环形电极施加捕获电压来捕获离子阱中的离子; 向一对端帽电极施加激励电压; 使用具有第一，第二和第三激励部分的宽带激励波形作为激励电压，其中所述第一和第三激励部分激励所述离子基本上除了所有第一组离子之外的离子，并且还排除基本上所有第二组离子，关于第一组离子的至少一个质荷比的质量 - 电荷比范围和激发第二组离子的第二激发部分; 施加第一和第三激发部分以排出除了基本上所有第一和第二组离子之外的离子; 以及施加所述第二激发部分以顺序地排出除了基本上所有第一组离子之外的离子，从而隔离离子阱中的第一组离子。还公开了相关装置。

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