The quadrupole mass analyzer is one type of mass analyzer used in mass spectrometry. As the name implies, it consists of 4 circular rods, set parallel to each other. In a quadrupole mass spectrometer (acronym QMS) the quadrupole is the component of the instrument responsible for filtering sample ions, based on their mass-to-charge ratio (m/z). Ions are separated in a quadrupole based on the stability of their trajectories in the oscillating electric fields that are applied to the rods.
Read more about Quadrupole Mass Analyzer: Principle of Operation, Applications, Triple Quadrupoles
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“May they rest in peace.
[Requiescant in pace.]”
—Missal, The. Order of Mass for the Dead.
The Missal is book of prayers and rites used to celebrate the Roman Catholic mass during the year.