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FT-ICR/MS
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FT-ICR/MS
An in-depth look at many of the applications where FT-ICR mass spectrometry is implemented. Contributing authors emphasize ways in which FT-ICR provides superior information to that of other types of mass spectrometers as well as where it may be less informative than other mass spectrometers. With the information provided, analytical chemists will be capable of assessing the usefulness of FT-ICR versus other mass spectrometric methods for their particular needs. Comprehensive chapters cover the history of ICR and other techniques based on the cyclotron principles of mass analysis and offer a descriptive explanation of the theory involved in fourier transform detection and analysis. Chapters also detail features and areas of active research in instrumentation and some specifications on commercial instruments as well as the home-built American Cyanamid instrument. Application chapters cover one technique in detail and illustrate its particular area of analysis.
Methodology for Nuclear Magnetic Resonance and Ion Cyclotron Resonance Mass Spectrometry
This thesis encompasses methodological developments in both nuclear magnetic resonance and Fourier transform ion cyclotron resonance mass spectrometry. The NMR section explores the effects of scalar relaxation on a coupled nucleus to measure fast exchange rates. In order to quantify these rates accurately, a precise knowledge of the chemical shifts of the labile protons and of the scalar couplings is normally required. We applied the method to histidine where no such information was available a priori, neither about the proton chemical shifts nor about the one-bond scalar coupling constants J(1H15N), since the protons were invisible due to fast exchange. We have measured the exchange rates o...
