Comparison of amino acid sequence analysis by electron ionization and negative-ion chemical ionization mass spectrometry |
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| Authors: | H Reinhard R Lauber U P Schlunegger |
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| Affiliation: | Institute of Organic Chemistry, University of Bern, Switzerland. |
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| Abstract: | ![]()
The positive electron ionization and negative chemical ionization mass spectra of 15 different derivatives of the tripeptide Phe-Ala-Leu have been compared. Total ion currents and ion currents of sequence-characterizing ions have been measured and compared. The negative-ion spectra, using 10% carbon dioxide in argon as moderator gas, proved to be simpler and contained more abundant sequence ions than the positive electron ionization spectra. |
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