期刊
ANALYTICAL CHEMISTRY
卷 85, 期 20, 页码 9543-9548出版社
AMER CHEMICAL SOC
DOI: 10.1021/ac401629b
关键词
-
资金
- U.S. Department of Energy, Division of Chemical Sciences [BES DE-FG02-04ER15520]
Simulation-based development and experimental characterization of a DC-only ion funnel is described herein. Radial ion confinement is achieved via periodic focusing whereby a collisionally dampened effective potential is generated in the inertial frame of an ion traversing the device with appreciable velocity. The new device, termed a periodic focusing ion funnel (PF IF), provides an efficient alternative to the rf ion funnel providing high ion transmission with fewer electrodes, simplified electrical circuitry, and reduced power supply requirements. The utility of the PF IF for structural ion mobility-mass spectrometry (IM-MS) studies is demonstrated using model peptide ions (bradykinin, gramicidin S, and trpzip 1).
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