{"term":{"id":"04874","title":"prolate trochoidal mass spectrometer","longtitle":"IUPAC Gold Book - prolate trochoidal mass spectrometer","doi":"10.1351\/goldbook.P04874","code":"P04874","status":"current","definitions":[{"id":1,"text":"A mass spectrometer in which ions of different mass\/charge are separated by means of crossed electric and magnetic fields in such a way that the selected ions follow a prolate trochoidal path. The usual term 'cycloidal' used sometimes is incorrect because the path used is not cycloidal. A cycloid is a special case of a trochoid.","links":[{"term":"mass spectrometer","url":"https:\/\/goldbook.iupac.org\/terms\/view\/M03732"}],"sources":["Orange Book, 2nd ed., p. 203 (https:\/\/media.iupac.org\/publications\/analytical_compendium\/)","PAC, 1991, 63, 1541. 'Recommendations for nomenclature and symbolism for mass spectroscopy (including an appendix of terms used in vacuum technology). (Recommendations 1991)' on page 1545 (https:\/\/doi.org\/10.1351\/pac199163101541)"]}],"altoutputs":{"html":"https:\/\/goldbook.iupac.org\/terms\/view\/P04874\/html","xml":"https:\/\/goldbook.iupac.org\/terms\/view\/P04874\/xml","plain":"https:\/\/goldbook.iupac.org\/terms\/view\/P04874\/plain"},"citation":"Citation: 'prolate trochoidal 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.P04874","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":"2026-06-24T17:41:57+00:00"}}