More on the subject of mass spectrometry can be learned from the tutorial What is Mass Spectrometry?
A practical guide for explaining Mass Spectrometry to laypeople, professionals and the media can be found in Explaining Mass Spectrometry an HTML version of the What is Mass Spectrometry? poster presented at the 2008 ASMS conference by Donald H. Chace and O. David Sparkman
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(Brochures of this poster are available through ASMS: office@asms.org)