mass fragment

mass fragment

Etymology: L, massa, lump, frangere, to shatter
(in mass spectrometry) a degraded part of a molecule containing one or more charges.
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In this mode, volatiles are separated by the amount of time they take to travel through a narrow tube (gas chromatography -- certain molecules interact with the sides of the tube more readily and thus travel more slowly) and then identified by their signature mass fragments in the mass spectrometer.
We now wish to source a Secondary Ion Mass Analyser capable of being operated with this instrument to provide spectra of small mass fragments from very small volumes.
In contrast, the spectrum from inside the crater (Figure 4, top) exhibits numerous peaks that can be identified as mass fragments from polydimethylsiloxane (PDMS).
With remarkable MS/MS sensitivity even at low mass fragments, the maXis impact rivals traditional triple-quad instruments in trace analysis quantitation, while offering all the flexibility and information content of precise-mass assignment and ultra-high resolution at UHPLC speed simultaneously.
All drugs known to interfere with the current HPLC method, including several biogenic amines and cardiac medications, were derivatized and injected to determine retention times and prominent mass fragments.