{"term":{"id":"12566","title":"sector mass spectrometer","longtitle":"IUPAC Gold Book - sector mass spectrometer","doi":"10.1351\/goldbook.12566","code":"12566","status":"current","definitions":[{"id":1,"text":"Mass spectrometer consisting of one or more magnetic sectors for recording a mass spectrum of a monoenergetic beam of ions. Such instruments may also have one or more electric sectors for energy dispersion that can be arranged for velocity-focusing by compensating for dispersion by the magnetic sector if the beam is not truly monoenergetic. Such a combination provides double focusing of ions of the same m\/z, i.e., focusing with respect to both direction and speed.","links":[{"term":"electric sectors","url":"https:\/\/goldbook.iupac.org\/\/terms\/view\/12405"},{"term":"magnetic sectors","url":"https:\/\/goldbook.iupac.org\/\/terms\/view\/12473"}],"sources":["PAC, 2013, 85, 1515. 'Definitions of terms relating to mass spectrometry (IUPAC Recommendations 2013)' on page 1589 (https:\/\/doi.org\/10.1351\/PAC-REC-06-04-06)"]}],"altoutputs":{"html":"https:\/\/goldbook.iupac.org\/terms\/view\/12566\/html","xml":"https:\/\/goldbook.iupac.org\/terms\/view\/12566\/xml","plain":"https:\/\/goldbook.iupac.org\/terms\/view\/12566\/plain"},"citation":"Citation: 'sector mass spectrometer' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. 10.1351\/goldbook.12566","license":"The IUPAC Gold Book is licensed under Creative Commons Attribution-ShareAlike CC BY-SA 4.0 International (https:\/\/creativecommons.org\/licenses\/by-sa\/4.0\/) for individual terms.","collection":"If you are interested in licensing the Gold Book for commercial use, please contact the IUPAC Executive Director at executivedirector@iupac.org .","disclaimer":"The International Union of Pure and Applied Chemistry (IUPAC) is continuously reviewing and, where needed, updating terms in the Compendium of Chemical Terminology (the IUPAC Gold Book). Users of these terms are encouraged to include the version of a term with its use and to check regularly for updates to term definitions that you are using.","accessed":"2026-07-12T11:24:28+00:00"}}