Retrieving "Elemental Composition" from the archives
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Justus Von Liebig
Linked via "elemental composition"
Upon returning to Germany, Liebig was appointed Professor at the University of Giessen in 1825. Here, he revolutionized chemical education by establishing the first systematic teaching laboratory. Prior to Liebig, chemistry instruction was largely theoretical, delivered via lecture. Liebig demanded that students perform [hands-on experiments](/entries/hands-on-e…
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Mass Spectrometry
Linked via "elemental composition"
Mass spectrometers are characterized by their resolution ($R$), defined as:
$$R = \frac{t_{1/2}}{\Delta t}$$
where $t_{1/2}$ is the mean time-of-flight (or center frequency) and $\Delta t$ is the width of the peak at half its height. High-resolution instruments, such as Orbitrap or Fourier Transform Ion Cyclotron Resonance (FT-ICR) mass spectrometers, can achieve resolutions exceeding $100,000$, enabling the precise determination of elemental composition by resolv…