Investigation of low-voltage on-resonance ion selection for Fourier transform mass spectrometry.
Investigation of low-voltage on-resonance ion selection for Fourier transform mass spectrometry.
复制标题
傅里叶变换质谱低压共振离子选择的研究。
DOI：
10.1016/s1044-0305(98)00061-0
复制
发表时间：
1998
影响因子：
3.2
通讯作者：
Wilkins,CL
中科院分区：
文献类型：
--
作者：
Pastor,SJ;Dienes,T;Yao,J;Wilkins,CL
低压非共振离子选择（LOIS）是近年来离子选择和存储的一种替代技术。在高压条件下，类似于四极轴化技术，不需要的（未选择的）捕获离子在轨道膨胀后通过与细胞板的碰撞从分析细胞中消除。经过几十秒的质量选择后剩余的离子可以以更好的相干性被检测到，从而提高了离子检测和灵敏度。本文介绍了用于测试离子再测量和离子转移能力的实验。离子运动的模拟使我们深入了解离子冷却的可能机制，这种机制似乎与轴向化过程不同。由于LOIS易于使用，不需要额外的硬件设备，并且离子选择结果可比较，因此LOIS是捕获离子实验的一个有吸引力的替代方案。
Low-voltage on-resonance ion selection (LOIS) was recently introduced as an alternative technique for ion selection and storage. Under high pressure conditions and similar to the technique of quadrupolar axialization, unwanted (unselected) trapped ions are eliminated from the analysis cell through collisions with cell plates following orbital expansion. The ions remaining after tens of seconds of mass selection can be detected with better coherence, leading to improvements in ion detection and sensitivity. Here, experiments designed to test ion remeasurement and ion transfer capabilities are presented. Simulations of ion motion give insight into the possible mechanism of ion cooling, which does not appear to be the same as that of the axialization process. Because of its ease of use, lack of need for additional hardware devices, and comparable ion selection results, LOIS is an attractive alternative for trapped ion experiments.