
%0 Journal Article
%A Head, M 
%A McAllister, T 
%T Detection by mass spectrometry of hydrocarbon biradicals, pyridine and aniline in a flame ionization detector
%J Australian Journal of Chemistry
%D 1982/08/01
%V 35
%N 8
%P 1743-1746
%K 
%R https://doi.org/10.1071/CH9821743
%U https://www.publish.csiro.au/paper/CH9821743 
%X The mass spectra of ions of > 75 in an f.i.d.-type flame with benzene additive have shown that hitherto undetected species of formulas CllH9+ and CI3H9+ are present, which may be attributed to protonation of the biradicals C11H8 and C13H8 by H3O+. The remainder of the hydrocarbon ions present are attributable to protonation of aromatic compounds (e.g. naphthalene and indene) which have been detected previously in premixed benzeneloxygen flames by electron impact ionization. Addition of NH3 to the benzene sample suppresses all the hydrocarbon peaks of m/z > 100 but generates new peaks of m/z 80 and 94, attributable to the protonation of pyridine and aniline. Aniline may be generated by addition of NH2 radicals to benzene in the pyrolysis and reaction zones of the flame. 
