High-speed digital frequency scanning ion trap mass spectrometry

Area of Science:

• Analytical Chemistry
• Mass Spectrometry

Background:

• Traditional ion trap mass spectrometry methods separate ion injection and mass scanning phases, limiting acquisition speed.
• This limitation restricts compatibility with high-speed separation techniques and high ion current sources.

Purpose of the Study:

• To introduce and evaluate a novel digital frequency scanning method for ion trap mass spectrometry.
• To demonstrate simultaneous ion injection and mass scanning for enhanced analytical throughput.

Main Methods:

• Implementation of digital frequency scanning for continuous ion injection and mass analysis in a 3D ion trap.
• Comparison of the digital frequency scanning method against classic voltage ramping mass-selective instability scanning.

Main Results:

• Achieved continuous injection and acquisition rates up to 1000 Hz (400,000 Th/s).
• Demonstrated faster ion control compared to traditional methods.
• Showcased compatibility with high-speed separation techniques (UPLC, GC×GC, IMS, CE) and ion funnels.

Conclusions:

• The digital frequency scanning method offers a faster alternative for ion trap mass analysis.
• This technique provides a flexible platform for optimizing the trade-off between speed and spectral quality.
• Enables high-speed mass analysis for rapidly changing ion compositions from advanced ion sources.