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From Mass Spec Terms

Welcome to the Mass Spectrometry Terms and Definitions Project Page

This goal of this site is to provide information about the IUPAC sponsored project to update the Standard Terms and Definitions for Mass Spectrometry.


There are currently 2,240 entries in Mass Spec Terms as of Wednesday September 10, 2025.

Working Drafts of the Mass Spectrometry Terms Document

Web-based discussion is closed and the mass spectrometry terms document is undergoing peer review.

Please send e-mail comments to the MS Terms Task Group

Thank you to everyone for your input.


External review draft of August 2006 (PDF Version).
  • IUPAC Task Group MS Terms Second Draft|Second Public Draft
Pre-review draft March 2006 (PDF Version).
  • Second Public Draft (ASMS Version)
Draft of May 2006 - reformatted from March 2006 (PDF Version).
  • First Public Draft
Presented at the 2005 American Society for Mass Spectrometry meeting June 2005..
Previous list of mass spectrometry terms

Contact the Task Group

This project is in its final stages and editing of the Wiki has been closed. Questions and comments about the final document (see above) should be directed to the Task Group: