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Author Xu, Y. ♦ Bae, Y. K. ♦ Beuhler, R. J. ♦ Friedman, L.
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword BASIC BIOLOGICAL SCIENCES ♦ INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY ♦ ORGANIC POLYMERS ♦ MASS SPECTRA ♦ MOLECULAR WEIGHT ♦ ALBUMINS ♦ CYTOCHROMES ♦ DYNODES ♦ GLOBULINS-GAMMA ♦ ION BEAMS ♦ IONS ♦ MASS SPECTROMETERS ♦ POLYETHYLENE GLYCOLS ♦ ALCOHOLS ♦ BEAMS ♦ CHARGED PARTICLES ♦ GLOBULINS ♦ GLYCOLS ♦ HYDROXY COMPOUNDS ♦ MEASURING INSTRUMENTS ♦ ORGANIC COMPOUNDS ♦ PIGMENTS ♦ POLYMERS ♦ PROTEINS ♦ SPECTRA ♦ SPECTROMETERS 550200* -- Biochemistry ♦ Chemical & Spectral Procedures
Abstract Electrospray mass spectra of biopolymeric ions can be used to determine ion masses using secondary electron pulse spectra. Secondary electron yields reflect electronic excitation deposited in a solid target, which is related to the electron density and velocity of projectile ions. Secondary electron pulse spectra provide a fingerprint which measures masses of ions of known velocity. Ions with masses from 411 (tetraheptylammonium ion) to 480 000 (apoferritin) amu give secondary electron yields that fall on a single curve of secondary electrons/amu plotted as a function of ion velocity. Secondary electron analysis revealed decomposition of larger polyethylene glycol ions (m > 10 000 amu). 5 refs., 6 figs.
ISSN 00223654
Educational Use Research
Learning Resource Type Article
Publisher Date 1993-11-18
Publisher Place United States
Journal Journal of Physical Chemistry
Volume Number 97
Issue Number 46


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