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Characterization of dipeptides by electron impact and chemical ionization mass spectrometry
Author(s) -
Schier G. M.,
Halpern B.,
Milne G. W. A.
Publication year - 1974
Publication title -
biomedical mass spectrometry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.475
H-Index - 121
eISSN - 1096-9888
pISSN - 0306-042X
DOI - 10.1002/bms.1200010403
Subject(s) - electron ionization , mass spectrometry , derivatization , chemistry , chemical ionization , pyrolytic carbon , ionization , direct electron ionization liquid chromatography–mass spectrometry interface , mass spectrum , analytical chemistry (journal) , atmospheric pressure chemical ionization , atmospheric pressure laser ionization , chromatography , organic chemistry , pyrolysis , ion
Abstract The components of mixtures of dipeptides can be identified from the electron ionization and chemical ionization mass spectra of their N ‐acetylacetonyl methyl ester derivatives without prior separation. The pyrolytic conversion of peptide trimethylanilinium salts to their methyl esters in the direct insertion probe of a mass spectrometer was found to be most suitable for the derivatization of dipeptides in mixtures.