Fourier transform time-of-flight mass spectrometry in an electrostatic ion beam trap

Area of Science:

• Analytical Chemistry
• Spectroscopy
• Physics

Background:

• Traditional mass spectrometers face limitations in analyzing large, complex molecules.
• Developing novel mass spectrometry techniques is crucial for advancing molecular analysis.

Purpose of the Study:

• To demonstrate the application of an electrostatic ion beam trap as a mass spectrometer.
• To evaluate the potential of this system for analyzing large molecules.

Main Methods:

• Utilizing an electrostatic ion beam trap analogous to an optical resonator for ion trapping.
• Employing nondestructive image charge detection and Fourier transform for mass spectral analysis.
• Testing the system with both light (Ar+, Xe+) and heavy (PEGnNa+, bradykinin) ions.

Main Results:

• Successfully obtained mass spectra from various ions, including heavy molecules.
• Demonstrated long ion storage times (several seconds) due to low residual gas pressure.
• Confirmed mass-independent charge detection, beneficial for large molecule analysis.

Conclusions:

• The electrostatic ion beam trap is a viable mass spectrometer.
• Its long ion flight paths and mass-independent detection are advantageous for large molecule investigations.
• This technique offers a promising new avenue for molecular research.