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    Evaluation of the Experimental Parameters which Control Electron Detachment Dissociation, and their Effect on the Fragmentation Efficiency of Glycosaminolgycan Carbohydrates

    Author
    Leach III, Franklin E.; Wolff, J.J.; Laremore, T.N.; Linhardt, Robert J.; Amster, I.J.
    ORCID
    https://orcid.org/0000-0003-2219-5833
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    EVALUATION OF THE EXPERIMENTAL PARAMETERS WHICH.pdf (688.8Kb)
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    Date Issued
    2008
    Subject
    Biology; Chemistry and chemical biology; Chemical and biological engineering; Biomedical engineering
    Degree
    Terms of Use
    In Copyright : this Item is protected by copyright and/or related rights. You are free to use this Item in any way that is permitted by the copyright and related rights legislation that applies to your use. For other uses you need to obtain permission from the rights-holder(s). https://rightsstatements.org/page/InC/1.0/;
    Full Citation
    Evaluation of the Experimental Parameters which Control Electron Detachment Dissociation, and their Effect on the Fragmentation Efficiency of Glycosaminolgycan Carbohydrates, F. E. Leach III, J. J. Wolff, T. N. Laremore, R. J. Linhardt, I. J. Amster, International Journal of Mass Spectrometry, 276,110-115, 2008.
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    URI
    https://hdl.handle.net/20.500.13015/5229; https://doi.org/10.1016/j.ijms.2008.05.017
    Abstract
    The efficiency of conversion of precursor ions to observable products for electron detachment dissociation (EDD) was measured as a function of the key experimental parameters to determine their optimal values for the Fourier transform mass spectrometry analysis of anionic glycosaminoglycan carbohydrates. These parameters include electron current, electron energy, dispenser cathode heater current, electron beam duration, charge state of the precursor ion, oligomer length, and precursor ion number accumulated in an external radio frequency multipole trap. Precursor conversion is most efficient at an electron current of 15 µA, and decreases at higher and lower values. The conversion of precursor to product ions increases in efficiency as the electron pulse duration is increased. Together, these data suggest that a radially repulsive electric field is produced between the electron beam and negative ions during EDD which causes the reaction cross section to decrease at higher values of electron current (>15 µA). Elevating the heater current of the dispenser cathode increases the electron flux, but also causes ion activation, presumably by blackbody infrared irradiation. An electronic circuit is described that allows the electron current produced by the dispenser cathode to be measured during an EDD or electron capture dissociation (ECD) experiment.;
    Description
    International Journal of Mass Spectrometry, 276,110-115; Note : if this item contains full text it may be a preprint, author manuscript, or a Gold OA copy that permits redistribution with a license such as CC BY. The final version is available through the publisher’s platform.
    Department
    The Linhardt Research Labs.; The Shirley Ann Jackson, Ph.D. Center for Biotechnology and Interdisciplinary Studies (CBIS);
    Publisher
    Elsevier
    Relationships
    The Linhardt Research Labs Online Collection; Rensselaer Polytechnic Institute, Troy, NY; https://harc.rpi.edu/;
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    A full text version is available in DSpace@RPI;
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