Encyclopedia > Q > Quadrupole ion trap
Quadrupole ion trap
A quadrupole ion trap (also known as a Paul trap, QIT, twisted quadrupole ion trap or sometimes just ion trap) refers to an ion trap that uses DC and radio frequency (RF) ~1 MHz oscillating AC electric fields to trap ions as well a mass spectrometer that uses such a trap to analyze ions. The invention of the quadrupole ion trap itself is attributed to Wolfgang Paul who shared the Nobel Prize in Physics in 1989 for this work.
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