Mass Spectrometer

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  • Created by: katie
  • Created on: 11-05-13 15:56

Process of Mass Spectrometer

  • Vaparation - the smaple must be a gaseous.
  • Ionisation - high energy electrons bombared the gaseous sample to form positive ions.
  • Acceleration -elecric field accelerates the postive ions to high speed.
  • Defelction- magnetic field deflects the ions according to mass/charge ratio.
  • Detection - ions with correct mass/charge ratio pass through a slit - detected by instrument (like ekectrometer). The signal amplified and recored.

Process - under high vacuum - prevent collision with air molecules.

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Structure of a Mass Spectrometer

                     (http://www.molecularstation.com/molecular-biology-images/data/506/Mass-spectrometer.gif)

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Uses of a Mass Spectrometer

  •  to find the average mass of an atom of an element.
  • identify unknown compounds.
  • identify trace compands in forensic science.
  • analysing molecules in space.
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