Stefan Meyer (mass spectrometry researcher)

Stefan Meyer, the mass-spectrometry researcher identified by the 2017 paper below, developed automated analysis of time-of-flight mass spectrometry data with collaborators. The paper lists his affiliation with Space Research and Planetary Sciences at the University of Bern. Its motivation includes handling large numbers of measurements for chemical-composition studies in space instrumentation.^[ref]

The analysis connects sampled waveforms to mass-related quantities rather than treating every peak position as a known species. Its instrument calibration model relates the flight time $t$ to mass-to-charge ratio throughwith instrument-dependent constants $k_0$ and $t_0$. Identified isotopes provide reference points for fitting the time-to-mass scale.^[ref]

For an original sensitivity calculation, suppose the corrected flight time is $t-t_0=20\mu \mathrm{s}$ and a timing displacement of $0.02\mu \mathrm{s}$ is introduced while the fitted constants are held fixed. The inferred ratio changes byor $0.2001\%$. A0.1-percent timing change therefore produces about a0.2-percent change in this modeled mass-to-charge value. This is a consequence of the square law, not the paper's measured accuracy for an instrument.

The same study also describes integrating peak areas for quantitative analysis. Converting time to a mass scale, estimating an integrated signal and identifying a species are different analysis tasks; automation must keep their assumptions and reference data explicit.^[ref]