Time-of-flight (TOF) mass spectrometry is experiencing a resurgence after a period dominated by Fourier transform mass spectrometry (FTMS). Matrix-assisted laser desorption/ionization (MALDI), which had been somewhat sidelined, is now regaining prominence, often in conjunction with TOF. This session will provide a comprehensive overview of TOF mass spectrometry, covering its fundamental principles, technological advancements, and diverse applications. It will be particularly valuable for researchers and practitioners seeking to deepen their understanding of this powerful and versatile technique.
- Time-of-Flight: Principles, Evolution, and Applications - Fabien Chirot (Lyon)
- explore the history of TOF mass spectrometry, from its inception in the late 1940s to its widespread adoption in the 1990s, and the technological advancements that have revolutionized its application.
- cover the fundamental principles of TOF, including the use of reflectors, various acceleration modes (axial and orthogonal), delayed acceleration, and aspects such as resolution, mass range, and sensitivity limits.
2. Detectors, Sensitivity, Resolution, and Acquisition Frequency - Guillaume van der Rest (Paris Saclay)
- delve into the specifications and analytical performance of TOF devices, emphasizing the impact of modifications to associated peripherals.
- discuss how acquisition frequency, influenced by electronics (sampling frequency, modulation, and voltage control), affects resolution.
- explain the role of multi-stage TOFs and multiple electrostatic mirrors in enhancing resolution, and address intrinsic sensitivity (ion transmission efficiency) and species detectability (detector technology).
3. Quantification: PASEF, SRM/PRM or DIA - Giovanni Chiappetta (PSL ESPCI Paris)
- highlight the resurgence of TOF in quantification, particularly in non-targeted modes.
- present the most appropriate quantification modes for this analyzer and their limitations.
4. Manufacturer R&D Example: How to guide and follow ions in a TOF? - Alexander Makarov (Brème)
- how to design a TOF analyzer geometry, focusing on ion trajectories, signal transmission, and amplification.