Definition of mass spectrometer in English:

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mass spectrometer

Pronunciation: /ˈˌmas ˌspekˈträmədər/


An apparatus for separating isotopes, molecules, and molecular fragments according to mass. The sample is vaporized and ionized, and the ions are accelerated in an electric field and deflected by a magnetic field into a curved trajectory that gives a distinctive mass spectrum.
Example sentences
  • The gas chromatograph separates the substances present, and then each substance is broken into molecular fragments by the mass spectrometer.
  • It may even carry an instrument like a mass spectrometer to measure material ejected from impact.
  • The emitted isotopes are focussed through a mass spectrometer and measured.

For editors and proofreaders

Syllabification: mass spec·trom·e·ter

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