quadrupole spectrometer

quadrupole spectrometer

[′kwä·drə‚pōl spek′träm·əd·ər]
(analytical chemistry)
A type of mass spectroscope in which ions pass along a line of symmetry between four parallel cylindrical rods; an alternating potential superimposed on a steady potential between pairs of rods filters out all ions except those of a predetermined mass. Also known as Massenfilter.
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Instrumentation includes Quadrupole Time of Flight and Triple Quadrupole spectrometers for accurate mass and quantitation work.