{"term":{"id":"12510","title":"<i>n<\/i><sup>th<\/sup>-generation product ion","longtitle":"IUPAC Gold Book - <i>n<\/i><sup>th<\/sup>-generation product ion","doi":"10.1351\/goldbook.12510","code":"12510","status":"current","definitions":[{"id":1,"text":"Serial product ions from dissociation or bimolecular reaction of selected precursor ions where \\(n\\) refers to the number of stages of dissociation or bimolecular reaction in a series of consecutive reactions that involve successive product ions.","notes":{"1":"Given the sequential fragmentation scheme: \\[\\ce{M1^{+} -> M2^{+} -> M3^{+} -> M4^{+} -> M5^{+}}\\] \\(\\ce{M4^{+}}\\) is the precursor ion of \\(\\ce{M5^{+}}\\), a 1st-generation product ion of \\(\\ce{M3^{+}}\\), a 2nd-generation product ion of \\(\\ce{M2^{+}}\\), and a 3rd-generation product ion of \\(\\ce{M1^{+}}\\)."},"links":[{"term":"nth-generation product ion spectrum","url":"https:\/\/goldbook.iupac.org\/\/terms\/view\/12511"}],"sources":["PAC, 2013, 85, 1515. 'Definitions of terms relating to mass spectrometry (IUPAC Recommendations 2013)' on page 1573 (https:\/\/doi.org\/10.1351\/PAC-REC-06-04-06)"]}],"altoutputs":{"html":"https:\/\/goldbook.iupac.org\/terms\/view\/12510\/html","xml":"https:\/\/goldbook.iupac.org\/terms\/view\/12510\/xml","plain":"https:\/\/goldbook.iupac.org\/terms\/view\/12510\/plain"},"citation":"Citation: '<i>n<\/i><sup>th<\/sup>-generation product ion' 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.12510","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":"2026-08-07T23:54:54+00:00"}}