Radiant energy – Ionic separation or analysis – Methods
Patent
1993-07-16
1994-10-04
Berman, Jack I.
Radiant energy
Ionic separation or analysis
Methods
364498, H01J 4900
Patent
active
053528913
ABSTRACT:
The production of mass spectra of chemical compounds of high molecular weights having a multiplicity of peaks is improved by generating an enhanced mass spectrum from the observed mass-to-charge spectrum. The intensity at each point within the enhanced spectrum is based upon a plurality of successive discrete peaks within the mass-to-charge spectrum. The intensities of the sequence of mass-to-charge peaks are combined to form a normalized product which is the new enhanced intensity at an assumed molecular weight. The intensities of the mass-to-charge spectrum at each integral fraction of the assumed molecular weight are included in the product. Only those intensities above a certain predetermined threshold, however, are included to avoid transfer of noise into the enhanced spectrum. Signal-to-noise ratio can in some applications be improved by including in the product all portions within the discrete peaks in the mass-to-charge spectrum which are contained within a window around each of the discrete peaks.
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Hagen Jeffrey J.
Monnig Curtis A.
Berman Jack I.
Dawes Daniel L.
The Regents of the University of California
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