Mass spectrometry. Part I

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Subject

Teaching resource

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Description

At the end of this activity, students should be able to:
– discuss the behaviour of charged particles in electric and magnetic fields
– relate the deflection of a charged particle in a magnetic field to the mass and charge of the particle and the strength of the magnetic field
– describe how a mass spectrometer works
– explain what a mass spectrum is
– explain the terms: base peak, molecular ion, fragmentation ion, relative abundance
– discuss mass spectra of the elements in terms of the natural abundance of isotopes
– explain the general features of mass spectra of organic compounds.

Connected with

Mass spectrometry. Part I [Class activity]

Consists of

Interaction of charged particles with electric and magnetic fields [Animation]

Charged particles in electric and magnetic fields [Whiteboard exercise]

Mass spectrometer [Illustration]

Injection and vaporisation of the sample [Animation]

Ionisation, acceleration and deflection of the particles in the magnetic field [Animation]

Detection, varying m/z of ions, data processing and spectrum plotting [Animation]

Mass spectrometer [Whiteboard exercise]

Producing of mass spectrum [Animation]

Mass spectrum of ethanoic acid [Illustration]