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Rectilinear Ion Trap: Concepts, Calculations, and Analytical Performance of a New Mass Analyzer

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Zheng Ouyang,^† Guangxiang Wu,^† Yishu Song,^† Hongyan Li,^† Wolfgang R. Plass,^‡ and R. Graham Cooks*^†

Department of Chemistry, Purdue University, West Lafayette, Indiana 47907-2084, and II. Physikalisches Institut, Justus-Liebig-Universität Giessen, Heinrich-Buff-Ring 16, 35392 Giessen, Germany

Anal. Chem., 2004, 76 (16), pp 4595–4605

DOI: 10.1021/ac049420n

Publication Date (Web): July 16, 2004

Section:

Organic Analytical Chemistry

Abstract

A mass analyzer based on a rectilinear geometry ion trap (RIT) has been built, and its performance has been characterized. Design concepts for this type of ion trap are delineated with emphasis on the effects of electrode geometry on the calculated electric field. The Mathieu stability region was mapped experimentally. The instrument can be operated using mass-selective instability scans in both the boundary and resonance ejection versions. Comparisons of performance between different versions of the device having different dimensions allowed selection of an optimized geometry with an appropriate distribution of higher-order electric fields. Comparisons made under the same conditions between the performance of a conventional cylindrical ion trap and a RIT of 4 times greater volume show an improvement of 40 times in the signal-to-noise ratio resulting from the higher ion trapping capacity of the RIT. The demonstrated capabilities of the RIT include tandem mass spectrometry, a mass resolution in excess of 1000, and a mass/charge range of 650 Th, all in a simple structure that is only 3.5 cm³ in internal volume.

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This article has been cited by 19 ACS Journal articles (5 most recent appear below).

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Sampling Wand for an Ion Trap Mass Spectrometer
Keyong Hou, Wei Xu, Jian Xu, R. Graham Cooks, and Zheng Ouyang
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Miniature Mass Spectrometer Systems Based on a Microengineered Quadrupole Filter
Andrew Malcolm, Steven Wright, Richard R. A. Syms, Neil Dash, Marc-André Schwab and Alan Finlay
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- Miniature Mass Spectrometer Systems Based on a Microengineered Quadrupole Filter
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  Abstract | Full Text HTML | Hi-Res PDF | PDF w/ Links
Paul Trap Mass Analyzer Consisting of Opposing Microfabricated Electrode Plates
Zhiping Zhang, Ying Peng, Brett J. Hansen, Ivan W. Miller, Miao Wang, Milton L. Lee, Aaron R. Hawkins and Daniel E. Austin
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Ion Trap Array Mass Analyzer: Structure and Performance
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- Ion Trap Array Mass Analyzer: Structure and Performance
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  An ion trap array (ITA) mass analyzer—a novel ion trap mass analyzer with multiple ion trapping and analyzing channels—was designed and constructed. Its property and performance were investigated and reported in this paper. The ITA was built with several ...
  Abstract | Full Text HTML | Hi-Res PDF | PDF w/ Links