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Welcome to the Mass Spectrometry Terms and Definitions Project Page

This goal of this site was to provide information about the IUPAC sponsored project to update the Standard Terms and Definitions for Mass Spectrometry. The wiki was open for comment between 2004 and 2006.

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

Previous lists of mass spectrometry terms

• IUPAC Gold Book

• IUPAC Orange Book Chapter 12

Working Drafts of the Mass Spectrometry Terms Document

Web-based discussion is closed and the mass spectrometry terms document is undergoing peer review. Working drafts are indicated below.

• IUPAC Task Group MS Terms Third and Final draft

External review final draft of August 2006 (PDF Version).

International Mass Spectrometry Conference Poster (PDF)

• IUPAC Task Group MS Terms Second 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..