Mass spectrometric differentiation of isomeric polycyclic aromatic hydrocarbons by chemical ionization with diethylether, tetrahydrofuran and dimethylcarbonate

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Eur. J. Mass Spectrom. 3, 281 - 290 (1997)

Mass spectrometric differentiation of isomeric polycyclic aromatic hydrocarbons by chemical ionization with diethylether, tetrahydrofuran and dimethylcarbonate

Karine Pointet, Arielle Milliet, Marie-France Renou-Gonnord and Paul Fleurat-Lessard
Laboratoire des Mécanismes Réactionnels, URA CNRS 1307, Ecole Polytechnique, F-91128 Palaiseau Cedex, France.
Michel Levart
Laboratoire de Synthèse Organique, URA CNRS 1308, Ecole Polytechnique, F-91128 Palaiseau Cedex, France.

ABSTRACT:

Chemical ionization of polycyclic aromatic hydrocarbons (PAHs) with three different reactants, diethylether, dimethylcarbonate and tetrahydrofuran, has been used to differentiate PAH isomers. The mechanisms of formation of the molecular ion, the protonated molecular ion and adducts have been elucidated in order to optimize the analytical diagnosis from the measurement of the relative abundances of ions observed on the PAHs chemical ionization mass spectra. As a practical application, chrysene and triphenylene have been determined quantitatively in a diesel exhaust particles sample.

Keywords: Chemical ionization mass spectrometry, PAH, diethylether,THF and dimethylcarbonate.

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