A Miniature Cylindrical Quadrupole Ion Trap:  Simulation and Experiment

A cylindrical quadrupole ion trap (r 0 = 2.5 mm, z 0 = 2.88 mm, ∼1/64 of the volume of commercial hyperbolic ion traps) has been constructed, its geometry optimized, and its performance examined in the mass-selective instability scan mode. Spectra of ionized perfluorotributylamine and o-dichlorobenz...

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Bibliographic Details
Published in:Analytical chemistry (Washington) 1998-12, Vol.70 (23), p.4896-4901
Main Authors: Badman, Ethan R, Johnson, Rudolph C, Plass, Wolfgang R, Cooks, R. Graham
Format: Article
Language:English
Subjects:
Analytical chemistry
Chemistry
Exact sciences and technology
Instruments, apparatus, components and techniques common to several branches of physics and astronomy
Ions
Mass spectrometers and related techniques
Physics
Spectrometric and optical methods
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Summary:A cylindrical quadrupole ion trap (r 0 = 2.5 mm, z 0 = 2.88 mm, ∼1/64 of the volume of commercial hyperbolic ion traps) has been constructed, its geometry optimized, and its performance examined in the mass-selective instability scan mode. Spectra of ionized perfluorotributylamine and o-dichlorobenzene show a resolution (m/Δm, 50% valley definition) of ∼100. The instrument has been coupled to a membrane introduction system to test its applicability for on-line reaction monitoring and to determine detection limits. Simulations using the ion trap simulation program are used to explore the effects of geometry on performance and to validate the experimental results.
ISSN:0003-2700
1520-6882
DOI:10.1021/ac980908w