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Experimental Methods for Trapping Ions Using Microfabricated Surface Ion Traps
Published on: August 17, 2017
The tripole linear ion trap with highly efficient orthogonal ion ejection designed by computer simulations.
Gary A Salazar1, Tsutomu Masujima
1Graduate School of Biomedical Sciences, Hiroshima University, 1-2-3 Kasumi, Minami ku, Hiroshima City, Hiroshima, Japan.
Rapid Communications in Mass Spectrometry : RCM
|April 4, 2008
Summary
A novel tripole linear ion trap (tLIT) demonstrates over 90% efficiency for analyte concentration and effective ion ejection, ideal for time-of-flight mass spectrometry. This ion guide offers high spatial capacity for improved analytical performance.
Area of Science:
- Analytical Chemistry
- Mass Spectrometry Instrumentation
Background:
- Linear ion traps (LITs) are crucial for mass spectrometry.
- Optimizing ion trapping and ejection is key for analytical sensitivity.
Purpose of the Study:
- To investigate a novel tripole ion guide as a linear ion trap (LIT).
- To evaluate its performance for analyte concentration and ion ejection in mass spectrometry.
Main Methods:
- Computer simulations were employed to study the tripole ion guide.
- The pseudopotential was calculated using multipole expansion of the tripole electric potential.
- Ion ejection efficiency and beam characteristics were analyzed.
Main Results:
- The tripole ion guide demonstrated effective radial ion containment.
- An analyte concentrator with high ion ejection efficiency (>90%) was developed.
- Ion spatial and kinetic energy spread were observed but correctable with a reflectron.
Conclusions:
- The tripole linear ion trap (tLIT) is a promising new analyte concentrator.
- Its design, with high space between rods and optimized focusing voltages, facilitates efficient ion ejection.
- The parallelized ion beam is suitable for time-of-flight mass spectrometry applications.
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