中文字数:1871,中文页数:2 英文字数:1165页数:3
Co-occurrence of Boundary and Resonance Ejection in a Multiplexed Rectilinear Ion Trap Mass Spectrometer (Amy M.Tabert, Michael P. Goodwin, and R. Graham Cooks Department of Chemistry, Purdue University, West Lafayette, Indiana, USA) A method is reported for evaluating ion trap mass analyzers by selection of operating conditions under which both boundary and resonance ejection peaks occur in a single mass scan. The choice of frequency and amplitude of the auxiliary waveform applied for resonance ejection can be such as to produce a resonance ejection mass spectrum with unit resolution or, under selected conditions, signals attributable to both boundary and resonance ejection in a single mass scan. The contrasting mass resolution associated with these two ejection processes is evident in these data. The co-occurrence of the two ejection phenomena is ascribed to the effects of higher-order fields; it is more marked in some rectilinear ion traps (RITs) than in other nominally identical devices, leading to the possibility of using it to compare individual mass analyzers in multiplexed instruments. The method is used to compare multiple ion traps driven by the same RF signal in a fully-multiplexed mass spectrometer, composed of parallel ion source/mass analyzer/detector channels each housed in one quadrant of a specialized vacuum chamber. (J Am Soc Mass Spectrom 2006, 17, 56–59) © 2005 American Society for Mass Spectrometry.
（作者：艾米M.Tabert 、迈克尔・P. Goodwin, 和R. Graham Cooks 部门化学, Purdue 大学, 西部拉斐特, 印第安纳, 美国） 一种通过选择在界限和共鸣排斥峰值的操作条件为评估离子陷阱的大规模分析仪发生在单一范围的分析仪被报道。选择在频率和幅度的辅助波形被应用于共鸣排斥，可能譬如导致共鸣排斥的大规模光谱被解决或者在相应选择条件下，信号归属与对界限和共鸣排斥在单通道多次扫描。与这许多解决相对应的是这两个排斥过程比较明显的这些数据。这两种相关的排斥现象的发生把它归咎于对更高层次领域的作用。相比较在其他有名无实的相同设备中，它更被标记在一些直线离子陷阱（RITS）中，从而导致使用它的可能性要在许多分析仪在多元化的仪器里作比较。这种方法被使用比较多个离子陷阱被同一个RF信号分开在一台充分多元化的质谱仪中，从而组成同时由离子源、大规模分析仪、检测通道开辟每个专业特性安置在一个象限中。
