Guan S, Huang Y, Xin T, Marshall A G
Center for Interdisciplinary Magnetic Resonance, National High Magnetic Field Laboratory, Florida State University, Tallahasee 23210, USA.
Rapid Commun Mass Spectrom. 1996;10(14):1855-9. doi: 10.1002/(SICI)1097-0231(199611)10:14<1855::AID-RCM764>3.0.CO;2-B.
The spatial distribution of the ion cyclotron orbit 'guiding centers' (magnetron radii) in a Penning trap determines virtually all aspects of Fourier transform ion cyclotron resonance (FTICR) mass spectrometry performance. Here, we demonstrate experimentally a simple method for determining that distribution, based on measuring FTICR mass spectral peak height following dipolar excitation/dipolar detection at various stages of magnetron radial expansion. No instrumental modifications are needed. Such data will make it possible to evaluate theoretical models of space charge and to quantitate and optimize ion formation, ion injection, ion trapping, ion transfer, photodissociation and ultrahigh-resolution FTICR experiments.
潘宁阱中离子回旋加速器轨道“导向中心”（磁控管半径）的空间分布实际上决定了傅里叶变换离子回旋共振（FTICR）质谱性能的各个方面。在此，我们通过实验展示了一种确定该分布的简单方法，该方法基于在磁控管径向扩展的各个阶段进行偶极激发/偶极检测后测量FTICR质谱峰高。无需对仪器进行修改。这些数据将能够评估空间电荷的理论模型，并对离子形成、离子注入、离子捕获、离子转移、光解离和超高分辨率FTICR实验进行定量和优化。
