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Cylindrical ion trap array with mass selection by variation in trap dimensions
Analytical Chemistry
|October 31, 2000
Summary
This study introduces a novel mass spectrometer array using cylindrical ion traps (CITs) of varying sizes for selective ion storage. This design enables simultaneous monitoring of different ion masses, simplifying complex analyses.
Area of Science:
- Analytical Chemistry
- Spectroscopy
- Instrumentation
Background:
- Conventional mass spectrometers can be complex and expensive.
- Selective ion monitoring is crucial for analyzing complex mixtures.
Purpose of the Study:
- To develop a mass spectrometer array using cylindrical ion traps (CITs) for simplified, selective ion analysis.
- To demonstrate the capability of the array for multiple ion monitoring.
Main Methods:
- Fabrication of a mass spectrometer array with multiple, differentially sized cylindrical ion traps.
- Application of radio frequency (rf) potentials to establish time-varying fields within the traps.
- Demonstration of ion storage using rf/dc (apex) isolation and stored waveform inverse Fourier transform (SWIFT) methods.
Main Results:
- Each CIT element, due to its specific size, selectively stores ions of different mass-to-charge ratios (m/z).
- A two-element array demonstrated selective storage of m/z 91 (aromatic hydrocarbons) and m/z 57 (aliphatic hydrocarbons).
- The array reduces electronic complexity, facilitating miniaturization.
Conclusions:
- The developed CIT array offers a simplified approach to multiple ion monitoring.
- This technology is well-suited for developing compact and efficient miniature mass spectrometer systems.