https://images.cnrs.fr/photo/20090001_0542
https://fr.wikipedia.org/wiki/Spectrométrie_de_masse_en_tand...


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Note added at 1 heure (2021-12-11 15:35:07 GMT)
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https://fr.unionpedia.org/Spectrométrie_de_masse_en_tandem_q...

Pourquoi "en tandem" ?:

https://www.labcompare.com/Mass-Spectrometry/130-Quadrupole-...
Quadrupole Time of Flight Mass Spectrometer (QTOF MS)
Q-TOF mass spectrometers combine TOF and quadrupole instruments, a pairing that results in high mass accuracy for precursor and product ions, strong quantitation capability, and fragmentation experiment applicability.
Functionality of Q-TOF MS:
The Q-TOF MS uses a quadrupole (four parallel rods arranged in a square formation), a collision cell, and a time of flight unit to produce spectra. Lighter ions accelerate faster down the flight tube to the detector, thus determining the ions’ mass-to-charge ratios. Q-TOF MS systems have MS-MS capabilities, and can be coupled to GC or LC systems. Ion sources include MALDI, ESI, APCI, and APPI. Speed and sensitivity are hallmarks of the quadrupole TOF MS, with detection reaching low-femtogram levels.

quadrupole: n'a rien à voir avec le vol quadripolaire (traduction rencontrée dans des sites non scientifiques)

Les instruments WATERS sont les références mondiale en matière de MS:
https://www.waters.com/waters/library.htm?locale=ru_by;cid=5...

Abstract / Summary
A tandem quadrupole mass spectrometer coupled to an LC is the most popular technique in targeted organic residue analysis. The development of Q-TOF MS technology, however, provides an attractive alternative MS approach in organic residue analysis.

Où voir le quadrupole:
https://www.youtube.com/watch?v=W-DRL-V2Rkg