Surface ionization mass spectrometry of organic compounds. I. Nitrogen-containing aliphatic organic compounds

Abstract

The surface ionization mass spectra of thirty nitrogen-containing aliphatic organic compounds, which are classified by the functional group, were measured using a quadrupole mass spectrometer with the thermionic source being a rhenium oxide emitter. The spectra are presented in the form of a table, which includes relative sensitivity, possible ion composition and the optimum emitter temperature along with the classified compound. The results are interpreted in terms of the three modes of ion formation, i.e. molecular surface ionization, dissociative surface ionization and associative surface ionization. The surface ionization mass spectrometry is particularily well suited to the application of alkylamines, aminoalcohols, quaternary ammonium salts nd hydrazines, which exhibit an intense molecular ion, together with diagnostic ions for structural determinations.