期刊
JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY
卷 18, 期 10, 页码 1729-1739出版社
SPRINGER
DOI: 10.1016/j.jasms.2007.07.010
关键词
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资金
- National Research Foundation of Korea [2006-341-C00022, 과06A1501] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
Photodissociation at 266 mn of some protonated peptides was investigated using a tandem-TOF spectrometer equipped with a cell near its first time focal point where the laser was irradiated. When a high voltage was applied to the cell, each product ion peak split into several components with different flight times. One of these was due to in-cell direct formation of the product ion and another due to post-cell formation. Those in between were due to consecutive dissociations, the first steps of which occurred inside the cell and the second steps outside the cell. A method based on flight time calculation was developed to analyze these components and to identify the intermediate ion for each consecutive component. The technique allows time-resolved photodissociation mechanistic studies on a 100-ns timescale.
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